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Washington, D.C.

$118+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — WAS
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Washington, D.C. are usually found in February or September, booked 57 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

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

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 20, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

February

Round-trip from

$238
(FlightHub)

One-way from

$118
(Delta)
Provider with most accurate pricing for Seattle/Tacoma Intl-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Washington, D.C. (WAS) flights.
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High demand for flights, 14% potential price rise
Search Deals
Best time to find cheap flights, 20% potential price drop
Search Deals
From Seattle/Tacoma Intl to Washington, D.C. (WAS)
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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 November 20, 2024.

This Kiwi.com deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/92:34 pmSEA - DCA
1 stop18h 27mFrontier
Tue 12/176:00 pmDCA - SEA
1 stop22h 10mFrontier
Deal found 11/19$241
This Orbitz deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/319:36 pmSEA - DCA
1 stop11h 32mMultiple Airlines
Tue 1/75:29 pmDCA - SEA
Nonstop6h 06mMultiple Airlines
Deal found 11/18$253
This United Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2512:37 pmSEA - IAD
Nonstop5h 03mUnited Airlines
Wed 1/85:30 pmIAD - SEA
Nonstop6h 01mUnited Airlines
Deal found 11/18$257
This Orbitz deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/55:15 amSEA - BWI
1 stop10h 09mMultiple Airlines
Fri 12/137:00 amBWI - SEA
Nonstop6h 04mMultiple Airlines
Deal found 11/20$269
This Mytrip deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/44:00 pmSEA - BWI
2 stops15h 34mSpirit Airlines
Fri 12/139:46 amBWI - SEA
1 stop13h 40mSpirit Airlines
Deal found 11/20$274
This American Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3110:56 pmSEA - DCA
1 stop9h 46mAmerican Airlines
Tue 1/75:00 amDCA - SEA
1 stop11h 06mAmerican Airlines
Deal found 11/18$276
This Delta deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/46:05 amSEA - BWI
1 stop9h 09mDelta
Mon 12/166:00 amBWI - SEA
1 stop7h 43mDelta
Deal found 11/19$277
This eDestinos deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/121:40 pmSEA - IAD
2 stops18h 34mFrontier
Mon 12/1612:14 pmIAD - SEA
2 stops27h 56mFrontier
Deal found 11/19$286
This Alaska Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/129:05 amSEA - IAD
1 stop9h 38mAlaska Airlines
Wed 1/86:57 pmIAD - SEA
Nonstop6h 03mAlaska Airlines
Deal found 11/18$291
This Alaska Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/129:24 pmSEA - BWI
Nonstop5h 06mAlaska Airlines
Mon 1/136:59 pmBWI - SEA
Nonstop6h 01mAlaska Airlines
Deal found 11/19$298
This American Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/612:15 amSEA - BWI
1 stop8h 21mAmerican Airlines
Sat 12/143:23 pmBWI - SEA
1 stop10h 46mAmerican Airlines
Deal found 11/18$301
This Delta deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2510:08 pmSEA - IAD
Nonstop5h 02mDelta
Mon 1/64:20 pmIAD - SEA
Nonstop6h 00mDelta
Deal found 11/18$307

Find flights from Seattle to Washington, D.C. within your budget

Customize your flight search to find flights from Seattle to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Mon 12/9

2:34 pm-12:01 pm

1 stop18h 27m

Washington, D.C. Reagan-National

Tue 12/17

6:00 pm-1:10 pm

1 stop22h 10m

$241

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 1/9

3:15 pm-12:01 pm

1 stop17h 46m

Washington, D.C. Reagan-National

Wed 1/15

8:00 am-11:04 am

Nonstop6h 04m

$245

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 1/8

7:25 am-3:25 pm

Nonstop5h 00m

Washington, D.C. Dulles Intl

Sat 1/11

4:20 pm-7:20 pm

Nonstop6h 00m

$257

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 12/25

5:00 am-3:39 pm

1 stop7h 39m

Washington, D.C. Dulles Intl

Wed 1/8

5:30 pm-8:31 pm

Nonstop6h 01m

$262

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Tue 1/21

7:50 pm-4:23 pm

1 stop17h 33m

Washington, D.C. Dulles Intl

Sat 2/1

6:57 pm-10:00 pm

Nonstop6h 03m

$266

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 2/20

11:17 pm-11:35 am

1 stop9h 18m

Washington, D.C. Reagan-National

Thu 2/27

4:15 pm-10:38 pm

1 stop9h 23m

$268

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Thu 12/5

5:15 am-6:24 pm

1 stop10h 09m

Baltimore/Washington

Fri 12/13

7:00 am-10:04 am

Nonstop6h 04m

$269

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Thu 1/9

10:33 am-12:18 am

2 stops10h 45m

Baltimore/Washington

Sun 1/12

6:03 am-2:56 pm

1 stop11h 53m

$272

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Thu 1/16

5:55 pm-8:14 pm

1 stop23h 19m

Baltimore/Washington

Mon 1/20

8:08 am-5:00 pm

1 stop11h 52m

$273

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 12/31

10:56 pm-11:42 am

1 stop9h 46m

Washington, D.C. Reagan-National

Tue 1/7

5:00 am-1:06 pm

1 stop11h 06m

$276

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 46 results
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Compare providers for flights from Seattle to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
GotogatePrice Accuracy3 starsTrust Score*2 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.

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.

Travel insights for flights from Seattle to Washington, D.C.

Get recent, data-driven insights about flights from Seattle to Washington, D.C. including ideal travel times, pricing trends, and more.

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 November 15, 2024.

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 57 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, September is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of $300). Flying from Seattle to Washington, D.C. in June is currently the most expensive (average of $376). 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?

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 November 20, 2024.

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 18% versus a flight at noon.

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 November 18, 2024.

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. Monday mornings 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.

Explore weekly flight availability from Seattle to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 20, 2024.

The most flights from SEA to WAS are scheduled on a Wednesday (27 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (11 on average).

Rainfall in Washington, D.C. by month

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

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

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated November 20, 2024.
See what other customers who have flown with Delta, United Airlines and Alaska Airlines 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.
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,461 reviews
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

JetBlue
7.5
Good
3,394 reviews
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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.?

    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.. 8 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 18 outbound flights to Washington, D.C. per day.

  • 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 $238 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $257 and $262 round-trip. Frontier is currently priced 40% 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 Delta, with whom users have recently found tickets for as low as $118. However, be on the lookout for offers from Spirit Airlines and United 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. Dulles Intl, Seattle/Tacoma Intl - Washington, D.C. Reagan-National 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 Iberia (93%), Qatar Airways (93%) or KLM (93%) 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 $833, our data shows the cheapest flight currently is $125. When looking at the most popular route, (Seattle/Tacoma Intl - Washington, D.C. Dulles Intl), you can expect to pay $257 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 $57.

  • 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, September is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of $300). Flying from Seattle to Washington, D.C. in June is currently the most expensive (average of $376). 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.

See more FAQs

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Top 8 airlines flying from Seattle to Washington, D.C.

Discover the top 8 airlines that operate flights from Seattle to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$86Average$226FlexibilityNo cancel feeOn-time62%
DeltaCheapest$146Average$483FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$169Average$534FlexibilityNo cancel feeOn-time83%
Spirit AirlinesCheapest$192Average$272FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$210Average$505FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$237Average$430FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$462FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$248Average$315FlexibilityNo cancel feeOn-time62%
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