How popular is this Seattle to Washington, D.C. flight route?

Flights from Seattle/Tacoma Intl to Washington, D.C. have been viewed 15 times in the past calendar month.

What are the cheapest airlines flying from Seattle to Washington, D.C. round-trip?

Our cheapest airline available from Seattle to Washington, D.C. is Frontier. Our recent data shows that you can find tickets from as low as $247 on this airline. Additional options worth looking into are Spirit Airlines and Hawaiian Airlines, starting at $250 and $257 round-trip. Frontier is currently priced 38% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Seattle to Washington, D.C. one-way?

The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $125. However, be on the lookout for offers from Frontier and Hawaiian Airlines, as they are both options that can get you from Seattle to Washington, D.C. for a low price.

What are the most popular routes from Seattle to Washington, D.C.?

The most popular flight routes from Seattle to Washington, D.C. are Seattle/Tacoma Intl - Washington, D.C. Reagan-National, Seattle/Tacoma Intl - Washington, D.C. Dulles Intl and Seattle/Tacoma Intl - Baltimore/Washington.

What are the cheapest flights from Seattle to Washington, D.C.?

While on average a flight from Seattle to Washington, D.C. is generally $356, our data shows the cheapest flight currently is $149. When looking at the most popular route, (Seattle/Tacoma Intl - Washington, D.C. Reagan-National), you can expect to pay $240 for that flight.

What are the most reliable airlines from Seattle to Washington, D.C.?

No one likes to see their flight delayed. When booking a flight from Seattle to Washington, D.C. consider choosing Alaska Airlines (84%), Air Tahiti Nui (84%) or Hawaiian Airlines (79%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from Seattle to Washington, D.C.?

American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from Seattle to Washington, D.C..

Where are the most common layover locations when flying from Seattle to Washington, D.C.?

Flights departing from Seattle and landing in Washington, D.C. layover in Chicago most frequently.

Where are the least popular layover locations for Seattle to Washington, D.C. flights?

Of the flights from Seattle to Washington, D.C. that have layovers, the fewest flights stop in Denver.

What are some popular things to do or see while on a layover in Chicago?

Magnificent Mile, Grant Park, and River North are the most popular attractions in Chicago if you're in need of something to do during your layover. Magnificent Mile, Grant Park, and River North can be visited by traveling about 15.5 mi, 16.2 mi, and 15.0 mi respectively from Chicago O'Hare Intl. Those on a layover in Chicago in need of a rental car can book one at Chicago O'Hare Intl for about $52.

What is the cheapest day to fly round-trip from Seattle to Washington, D.C.?

Wednesday is generally a great day to depart. Flying on this day could help you save up to 25%.

How far in advance should I book a flight from Seattle to Washington, D.C.?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 55 days in advance, which can save you up to 70% on flights from Seattle to Washington, D.C. compared to booking the week you need them. Waiting 55 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $466. For sooner than that we have options available in the next 3 days from $552.

What is the cheapest month to fly from Seattle to Washington, D.C.?

September is one of the best times of the year to fly to Washington, D.C. from Seattle. Prices for September average $404 per person but you can even find prices for as low as $203. The most expensive prices can be found in the month of December. Opting for a September flight can save you 28% on your journey compared to booking in December

Most accurate provider : When it comes to deals on Seattle-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Washington, D.C. flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Seattle-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from Seattle to Washington, D.C.?

Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Washington, D.C.. 9 airlines have flights from Seattle/Tacoma Intl to Washington, D.C. on a regular basis. Booking flights from Seattle/Tacoma Intl to Washington, D.C. should not be difficult; the airport handles an average of 28 outbound flights to Washington, D.C. per day.

Can I find deals for flights from Seattle to Washington, D.C. that include hotel bookings?

Yes. In addition to deals on Seattle to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Seattle to Washington, D.C.?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Washington, D.C..

Can I find deals for business class flights from Seattle to Washington, D.C.?

Yes. Cheapflights offers flight deals from Seattle to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$125+ Flights from Seattle to Washington, D.C.

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Find cheap flights from Seattle to Washington, D.C. with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Washington, D.C. are usually found in September or March, booked 90 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

Cheap flight deals from Seattle to Washington, D.C.

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$247 (Cheapflightsfares)
One-way from	$125 (Mytrip)
Popular in	December
Cheapest in	September
Average price	$397
Good round-trip deal	$332 or less
Good one-way deal	$189 or less

Provider with most accurate pricing for Seattle/Tacoma Intl-Washington, D.C. (WAS) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Washington, D.C. (WAS) flights.

Search Deals

From Seattle/Tacoma Intl to Washington, D.C. (WAS)

Search Deals

One-way flight from Seattle/Tacoma Intl to Washington, D.C. (WAS)

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($28 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Seattle/Tacoma Intl to Washington, D.C. (WAS).

Search Deals

Price to beat on a one-way flight from Seattle/Tacoma Intl to Washington, D.C. (WAS).

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Find flight deals from Seattle to Washington, D.C.

Cheapest flights from Seattle to Washington, D.C.
Explore the most affordable flight options available from Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.

Wed 4/236:00 amSEA - DCA

1 stop7h 59mFrontier

Tue 5/66:00 pmDCA - SEA

1 stop8h 49mFrontier

Deal found 4/3

$247

Sat 5/103:20 pmSEA - BWI

1 stop11h 50mSpirit Airlines

Tue 5/202:14 pmBWI - SEA

2 stops12h 56mSpirit Airlines

Deal found 4/4

$250

Thu 5/18:22 pmSEA - IAD

1 stop31h 09mFrontier

Thu 5/87:45 amIAD - SEA

1 stop13h 15mFrontier

Deal found 4/4

$250

Sat 5/31:50 pmSEA - DCA

Nonstop5h 09mMultiple Airlines

Mon 5/56:00 pmDCA - SEA

1 stop9h 44mMultiple Airlines

Deal found 4/3

$254

Sat 5/2410:27 pmSEA - BWI

Nonstop5h 02mHawaiian Airlines

Sat 5/317:05 pmBWI - SEA

Nonstop5h 55mHawaiian Airlines

Deal found 4/4

$257

Sat 4/267:25 amSEA - DCA

Nonstop5h 06mDelta

Sat 5/34:50 pmDCA - SEA

Nonstop6h 01mDelta

Deal found 4/3

$257

Sat 4/2610:30 pmSEA - IAD

Nonstop4h 50mDelta

Wed 4/307:25 amIAD - SEA

Nonstop5h 55mDelta

Deal found 4/4

$257

Wed 4/3011:40 pmSEA - IAD

Nonstop5h 03mMultiple Airlines

Mon 5/58:01 amIAD - SEA

1 stop12h 59mMultiple Airlines

Deal found 4/2

$259

Sat 4/264:00 pmSEA - IAD

Nonstop4h 58mHawaiian Airlines

Sat 5/36:30 amIAD - SEA

Nonstop5h 43mHawaiian Airlines

Deal found 4/4

$263

Sat 5/35:59 pmSEA - IAD

1 stop8h 41mAlaska Airlines

Tue 5/67:13 pmIAD - SEA

Nonstop5h 47mAlaska Airlines

Deal found 4/4

$267

Sun 4/131:56 pmSEA - BWI

1 stop18h 31mMultiple Airlines

Thu 4/179:39 pmBWI - SEA

1 stop16h 56mMultiple Airlines

Deal found 4/3

$271

Tue 7/156:05 amSEA - BWI

1 stop9h 41mDelta

Fri 7/256:10 pmBWI - SEA

1 stop8h 58mDelta

Deal found 4/3

$273

Best flights from Seattle to Washington, D.C.
Discover carefully curated flight deals from Seattle to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 4, 2025.

Wed 4/236:00 amSEA - DCA

1 stop7h 59mFrontier

Tue 5/66:00 pmDCA - SEA

1 stop8h 49mFrontier

Deal found 4/3

$247

Sat 5/103:20 pmSEA - BWI

1 stop11h 50mSpirit Airlines

Tue 5/202:14 pmBWI - SEA

2 stops12h 56mSpirit Airlines

Deal found 4/4

$250

Sat 5/31:50 pmSEA - DCA

Nonstop5h 09mMultiple Airlines

Mon 5/56:00 pmDCA - SEA

1 stop9h 44mMultiple Airlines

Deal found 4/3

$254

Sat 5/2410:27 pmSEA - BWI

Nonstop5h 02mHawaiian Airlines

Sat 5/317:05 pmBWI - SEA

Nonstop5h 55mHawaiian Airlines

Deal found 4/4

$257

Sat 4/267:25 amSEA - DCA

Nonstop5h 06mDelta

Sat 5/34:50 pmDCA - SEA

Nonstop6h 01mDelta

Deal found 4/3

$257

Sat 5/35:59 pmSEA - IAD

1 stop8h 41mAlaska Airlines

Tue 5/67:13 pmIAD - SEA

Nonstop5h 47mAlaska Airlines

Deal found 4/4

$267

Fri 5/212:59 amSEA - DCA

1 stop9h 48mAmerican Airlines

Wed 5/75:00 amDCA - SEA

1 stop8h 42mAmerican Airlines

Deal found 4/3

$277

Wed 4/237:17 pmSEA - IAD

1 stop7h 05mUnited Airlines

Tue 4/2912:55 pmIAD - SEA

1 stop9h 06mUnited Airlines

Deal found 4/2

$277

Thu 4/1711:50 pmSEA - IAD

1 stop9h 33mSun Country Air

Thu 4/2412:37 pmIAD - SEA

1 stop24h 55mSun Country Air

Deal found 4/4

$315

Thu 7/109:10 pmSEA - BWI

Nonstop5h 00mSouthwest

Mon 7/215:30 pmBWI - SEA

1 stop9h 55mSouthwest

Deal found 4/3

$332

Thu 5/18:22 pmSEA - IAD

1 stop31h 09mFrontier

Thu 5/87:45 amIAD - SEA

1 stop13h 15mFrontier

Deal found 4/4

$250

Sat 4/2610:30 pmSEA - IAD

Nonstop4h 50mDelta

Wed 4/307:25 amIAD - SEA

Nonstop5h 55mDelta

Deal found 4/4

$257

Last-minute flights from Seattle to Washington, D.C.
Discover last-minute flight deals from Seattle to Washington, D.C.. Data last updated April 4, 2025 and is based on user searches.

Fri 4/111:56 pmSEA - DCA

1 stop19h 08mMultiple Airlines

Fri 4/188:00 amDCA - SEA

Nonstop5h 58mMultiple Airlines

Deal found 4/3

$397

Fri 4/118:38 amSEA - DCA

Nonstop5h 17mAlaska Airlines

Fri 4/188:00 amDCA - SEA

Nonstop5h 58mAlaska Airlines

Deal found 4/3

$484

Fri 4/1110:15 pmSEA - IAD

Nonstop4h 53mDelta

Sat 4/267:25 amIAD - SEA

Nonstop5h 57mDelta

Deal found 4/4

$488

Sat 4/124:59 pmSEA - IAD

1 stop9h 41mAlaska Airlines

Sat 4/267:00 amIAD - SEA

1 stop14h 59mAlaska Airlines

Deal found 4/4

$546

Sun 4/131:56 pmSEA - BWI

1 stop18h 31mMultiple Airlines

Thu 4/179:39 pmBWI - SEA

1 stop16h 56mMultiple Airlines

Deal found 4/3

$271

Sun 4/131:56 pmSEA - BWI

1 stop18h 31mFrontier

Wed 4/165:18 pmBWI - SEA

1 stop21h 38mFrontier

Deal found 4/4

$320

Sun 4/132:45 pmSEA - IAD

1 stop7h 20mSouthwest

Fri 4/185:35 pmIAD - SEA

1 stop9h 55mSouthwest

Deal found 4/3

$556

Sun 4/1312:45 amSEA - BWI

1 stop6h 45mDelta

Mon 4/215:40 pmBWI - SEA

1 stop7h 45mDelta

Deal found 4/4

$557

Mon 4/1412:30 pmSEA - BWI

2 stops22h 17mSpirit Airlines

Tue 4/229:39 pmBWI - SEA

1 stop16h 56mSpirit Airlines

Deal found 4/3

$269

Mon 4/141:56 pmSEA - DCA

1 stop29h 03mFrontier

Sun 4/201:03 pmDCA - SEA

1 stop25h 53mFrontier

Deal found 4/3

$270

Mon 4/1412:30 pmSEA - IAD

3 stops19h 56mMultiple Airlines

Mon 4/2111:37 amIAD - SEA

1 stop8h 42mMultiple Airlines

Deal found 4/4

$542

Mon 4/143:35 pmSEA - IAD

1 stop16h 50mUnited Airlines

Sun 4/276:10 amIAD - SEA

1 stop10h 49mUnited Airlines

Deal found 4/4

$545

One-way flights from Seattle to Washington, D.C.
Search for one-way flight options from Seattle to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated April 4, 2025.

Mon 4/2812:30 pmSEA - BWI

2 stops26h 23mSpirit Airlines

Deal found 4/2

$125

Thu 5/812:21 pmSEA - BWI

1 stop26h 01mFrontier

Deal found 4/4

$126

Wed 4/309:40 pmSEA - BWI

Nonstop5h 06mHawaiian Airlines

Deal found 4/4

$129

Fri 6/67:35 pmSEA - BWI

1 stop7h 05mDelta

Deal found 4/4

$130

Sat 5/3111:50 pmSEA - BWI

1 stop7h 23mUnited Airlines

Deal found 4/4

$139

Thu 5/81:50 pmSEA - DCA

Nonstop5h 09mHawaiian Airlines

Deal found 4/4

$144

Thu 5/111:40 pmSEA - IAD

Nonstop5h 03mHawaiian Airlines

Deal found 4/4

$144

Thu 5/157:10 pmSEA - BWI

1 stop13h 20mSun Country Air

Deal found 4/2

$145

Thu 4/246:25 pmSEA - IAD

1 stop14h 58mSun Country Air

Deal found 4/3

$145

Fri 4/111:56 pmSEA - DCA

1 stop19h 08mFrontier

Deal found 4/3

$146

Tue 6/31:48 pmSEA - DCA

Nonstop5h 11mAlaska Airlines

Deal found 4/4

$149

Mon 4/283:36 pmSEA - IAD

1 stop11h 04mAlaska Airlines

Deal found 4/3

$153

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 4/23

6:00 am-4:59 pm

1 stop7h 59m

Washington, D.C. Reagan-National

Tue 5/6

6:00 pm-11:49 pm

1 stop8h 49m

$247

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sat 5/10

3:20 pm-6:10 am

1 stop11h 50m

Baltimore/Washington

Tue 5/20

2:14 pm-12:10 am

2 stops12h 56m

$250

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Thu 5/1

8:22 pm-6:31 am

1 stop31h 09m

Washington, D.C. Dulles Intl

Thu 5/8

7:45 am-6:00 pm

1 stop13h 15m

$250

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 5/3

1:50 pm-9:59 pm

Nonstop5h 09m

Washington, D.C. Reagan-National

Mon 5/5

6:00 pm-12:44 am

1 stop9h 44m

$254

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sat 5/24

10:27 pm-6:29 am

Nonstop5h 02m

Baltimore/Washington

Sat 5/31

7:05 pm-10:00 pm

Nonstop5h 55m

$257

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 4/26

7:25 am-3:31 pm

Nonstop5h 06m

Washington, D.C. Reagan-National

Sat 5/3

4:50 pm-7:51 pm

Nonstop6h 01m

$257

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 4/26

10:30 pm-6:20 am

Nonstop4h 50m

Washington, D.C. Dulles Intl

Sat 5/3

7:25 am-10:22 am

Nonstop5h 57m

$257

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 4/30

11:40 pm-7:43 am

Nonstop5h 03m

Washington, D.C. Dulles Intl

Mon 5/5

8:01 am-6:00 pm

1 stop12h 59m

$259

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 4/26

4:00 pm-11:58 pm

Nonstop4h 58m

Washington, D.C. Dulles Intl

Sat 5/3

6:30 am-9:13 am

Nonstop5h 43m

$263

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 5/10

1:50 pm-9:59 pm

Nonstop5h 09m

Washington, D.C. Reagan-National

Wed 5/14

9:59 am-6:51 pm

1 stop11h 52m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 53 results

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Compare providers for flights from Seattle to Washington, D.C.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Washington, D.C. in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*2 stars
Gotogate	Price Accuracy3 stars	Trust Score*3 stars
CheapTicketsDeal	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Seattle-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Washington, D.C. flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Seattle-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Seattle to Washington, D.C. flights

Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Washington, D.C. trip

Airlines

Alaska Airlines

Alaska's Premium Class offers extra legroom and free cocktails, ideal for comfort on medium-haul flights.

Alaska's Wi-Fi is a flat fee, perfect for business travelers needing connectivity on longer flights.

Read more about Alaska Airlinesby Robert Schrader

United Airlines

United's Economy Plus offers extra legroom, ideal for added comfort on medium-haul flights.

United's Polaris Lounges offer exclusive amenities like showers and dining for premium passengers.

Read more about United Airlinesby Harriet Baskas

Airports

SEA

Plan to arrive at SEA at least two hours before your flight. Use SEA Spot Saver for security appointments to reduce wait times.

IAD

Use the Silver Line Metro for a cheap ride to D.C. from IAD, taking less than 40 minutes to reach the city.

Our travel experts

Robert Schrader

Expert on Alaska Airlines

Harriet Baskas

Expert on United Airlines

Ramsey Qubein

Expert on IAD

Brandon Schultz

Expert on SEA

Best time to book a flight from Seattle to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Seattle with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Washington, D.C.

How far ahead should I book a flight from Seattle to Washington, D.C.?

The price you pay for your flight from Seattle to Washington, D.C. may vary depending on when you book. For the best chance of a lower fare, look to book 90 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Washington, D.C.?

Currently, August is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of $241). Flying from Seattle to Washington, D.C. in March is currently the most expensive (average of $290). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to WAS?

When flying from Seattle to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 31% versus a flight at noon.

What is the cheapest day to fly from Seattle to Washington, D.C.?

Travelers seeking maximum savings on their Seattle to Washington, D.C. flight should consider departing on Saturday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Seattle to Washington, D.C.

The most flights from SEA to WAS are scheduled on a Wednesday (35 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

Rainfall in Washington, D.C. by month

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

Temperature in Washington, D.C. by month

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Washington, D.C.

See what other customers who have flown with Alaska Airlines, Southwest and Delta from Seattle to Washington, D.C. have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Alaska Airlines

8.0

Very good

9,837 reviews

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Southwest

8.0

Very good

4,276 reviews

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Delta

8.0

Very good

7,899 reviews

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Hawaiian Airlines

7.9

Good

2,353 reviews

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

United Airlines

7.4

Good

8,618 reviews

Alaska Airlines

8.0

Very good

9,837 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Related info for your journey

What airport do you fly from for flights from Seattle to Washington, D.C.?
Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Washington, D.C.. 9 airlines have flights from Seattle/Tacoma Intl to Washington, D.C. on a regular basis. Booking flights from Seattle/Tacoma Intl to Washington, D.C. should not be difficult; the airport handles an average of 28 outbound flights to Washington, D.C. per day.
How popular is this Seattle to Washington, D.C. flight route?
Flights from Seattle/Tacoma Intl to Washington, D.C. have been viewed 15 times in the past calendar month.
What are the cheapest airlines flying from Seattle to Washington, D.C. round-trip?
Our cheapest airline available from Seattle to Washington, D.C. is Frontier. Our recent data shows that you can find tickets from as low as $247 on this airline. Additional options worth looking into are Spirit Airlines and Hawaiian Airlines, starting at $250 and $257 round-trip. Frontier is currently priced 38% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Seattle to Washington, D.C. one-way?
The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $125. However, be on the lookout for offers from Frontier and Hawaiian Airlines, as they are both options that can get you from Seattle to Washington, D.C. for a low price.
What are the most popular routes from Seattle to Washington, D.C.?
The most popular flight routes from Seattle to Washington, D.C. are Seattle/Tacoma Intl - Washington, D.C. Reagan-National, Seattle/Tacoma Intl - Washington, D.C. Dulles Intl and Seattle/Tacoma Intl - Baltimore/Washington.
What are the most reliable airlines from Seattle to Washington, D.C.?
No one likes to see their flight delayed. When booking a flight from Seattle to Washington, D.C. consider choosing Alaska Airlines (84%), Air Tahiti Nui (84%) or Hawaiian Airlines (79%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Seattle to Washington, D.C.?
While on average a flight from Seattle to Washington, D.C. is generally $356, our data shows the cheapest flight currently is $149. When looking at the most popular route, (Seattle/Tacoma Intl - Washington, D.C. Reagan-National), you can expect to pay $240 for that flight.
Where are the most common layover locations when flying from Seattle to Washington, D.C.?
Flights departing from Seattle and landing in Washington, D.C. layover in Chicago most frequently.
What are some popular things to do or see while on a layover in Chicago?
Magnificent Mile, Grant Park, and River North are the most popular attractions in Chicago if you're in need of something to do during your layover. Magnificent Mile, Grant Park, and River North can be visited by traveling about 15.5 mi, 16.2 mi, and 15.0 mi respectively from Chicago O'Hare Intl. Those on a layover in Chicago in need of a rental car can book one at Chicago O'Hare Intl for about $52.
Where are the least popular layover locations for Seattle to Washington, D.C. flights?
Of the flights from Seattle to Washington, D.C. that have layovers, the fewest flights stop in Denver.
Can I find deals for flights from Seattle to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Seattle to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Seattle to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Washington, D.C..
Can I find deals for business class flights from Seattle to Washington, D.C.?
Yes. Cheapflights offers flight deals from Seattle to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Seattle to Washington, D.C.?
Currently, August is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of $241). Flying from Seattle to Washington, D.C. in March is currently the most expensive (average of $290). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 9 airlines flying from Seattle to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$86	Average$231	FlexibilityNo cancel fee	On-time62%
Hawaiian Airlines	Cheapest$143	Average$437	FlexibilityNo cancel fee	On-time85%
Sun Country Air	Cheapest$169	Average$534	FlexibilityNo cancel fee	On-time83%
Spirit Airlines	Cheapest$178	Average$267	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$196	Average$415	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$206	Average$464	FlexibilityNo cancel fee	On-time71%
Alaska Airlines	Cheapest$241	Average$500	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$241	Average$426	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$296	Average$487	FlexibilityNo cancel fee	On-time63%

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$125+ Cheap flights from Seattle (SEA) to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/28. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Washington, D.C. are usually found in September or March, booked 90 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

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Cheapest flights from Seattle to Washington, D.C.Explore the most affordable flight options available from Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.

Explore the most affordable flight options available from Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.

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Best time to book a flight from Seattle to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Seattle with our price prediction graph.

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Everything you need to know about your flight from Seattle to Washington, D.C.

How far ahead should I book a flight from Seattle to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Washington, D.C.. Price data was last updated on April 4, 2025.

What is the cheapest month to book a flight from Seattle to Washington, D.C.?

What is the cheapest time of day to fly from SEA to WAS?

Find hourly flight availability from Seattle to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 4, 2025.

What is the cheapest day to fly from Seattle to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Washington, D.C.. Price data was last updated on March 30, 2025.

Weekly flight availability from Seattle to Washington, D.C.

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

Reviews of airlines servicing Washington, D.C.

See what other customers who have flown with Alaska Airlines, Southwest and Delta from Seattle to Washington, D.C. have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Seattle to Washington, D.C.?

How popular is this Seattle to Washington, D.C. flight route?

What are the cheapest airlines flying from Seattle to Washington, D.C. round-trip?

What are the cheapest airlines to fly from Seattle to Washington, D.C. one-way?

What are the most popular routes from Seattle to Washington, D.C.?

What are the most reliable airlines from Seattle to Washington, D.C.?

What are the cheapest flights from Seattle to Washington, D.C.?

Where are the most common layover locations when flying from Seattle to Washington, D.C.?

What are some popular things to do or see while on a layover in Chicago?

Where are the least popular layover locations for Seattle to Washington, D.C. flights?

Can I find deals for flights from Seattle to Washington, D.C. that include hotel bookings?

How can I find direct flights from Seattle to Washington, D.C.?

Can I find deals for business class flights from Seattle to Washington, D.C.?

What is the cheapest month to book a flight from Seattle to Washington, D.C.?

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Alternative routes for Seattle to Washington, D.C.

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Top 9 airlines flying from Seattle to Washington, D.C.

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Cheapest flights from Seattle to Washington, D.C.
Explore the most affordable flight options available from Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.