Washington, D.C.

$144+ 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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — WAS
dic. 23 — dic. 301
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The best prices from Seattle/Tacoma Intl to Washington, D.C. are usually found in September or February, booked 65 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 diciembre 18, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$265
(flugladen.de)

One-way from

$144
(Alaska Airlines)

Popular in

December

Cheapest in

September

Average price

$528
Provider with most accurate pricing for Seattle/Tacoma Intl-Washington, D.C. (WAS) flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Washington, D.C. (WAS) flights.
From Seattle/Tacoma Intl to Washington, D.C. (WAS)
One-way flight from Seattle/Tacoma Intl to Washington, D.C. (WAS)
High demand for flights, 6% potential price rise
Best time to find cheap flights, 2% potential price drop
Average for round-trip flights in December 2024

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 diciembre 18, 2024.

This Delta deal was found by Cheapflights users on 12/17. 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.
mié. 12/257:05 pmSEA - BWI
1 stop7h 42mDelta
mié. 1/87:15 amBWI - SEA
1 stop8h 10mDelta
Deal found 12/17$271
This Frontier deal was found by Cheapflights users on 12/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/259:36 pmSEA - DCA
1 stop11h 32mFrontier
dom. 1/127:00 amDCA - SEA
1 stop11h 41mFrontier
Deal found 12/17$324
This Orbitz deal was found by Cheapflights users on 12/17. 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.
mié. 12/259:36 pmSEA - DCA
1 stop11h 32mMultiple Airlines
jue. 1/95:29 pmDCA - SEA
Nonstop6h 06mMultiple Airlines
Deal found 12/17$334
This United Airlines deal was found by Cheapflights users on 12/17. 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.
mar. 12/3112:30 pmSEA - BWI
1 stop7h 58mUnited Airlines
mar. 1/79:50 amBWI - SEA
2 stops14h 30mUnited Airlines
Deal found 12/17$339
This Alaska Airlines deal was found by Cheapflights users on 12/17. 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.
mar. 12/319:39 pmSEA - IAD
Nonstop5h 01mAlaska Airlines
mar. 1/75:25 pmIAD - SEA
1 stop19h 05mAlaska Airlines
Deal found 12/17$386
This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/316:11 amSEA - BWI
1 stop9h 32mSpirit Airlines
mar. 1/78:44 amBWI - SEA
1 stop31h 27mSpirit Airlines
Deal found 12/17$413
This Delta deal was found by Cheapflights users on 12/17. 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.
mar. 12/2410:08 pmSEA - IAD
Nonstop5h 02mDelta
mié. 1/84:05 pmIAD - SEA
Nonstop6h 01mDelta
Deal found 12/17$417
This American Airlines deal was found by Cheapflights users on 12/17. 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.
mar. 12/2411:10 pmSEA - DCA
1 stop9h 32mAmerican Airlines
mié. 1/812:59 pmDCA - SEA
1 stop10h 05mAmerican Airlines
Deal found 12/17$476
This Mytrip deal was found by Cheapflights users on 12/17. 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.
mar. 12/316:34 pmSEA - BWI
2 stops25h 09mMultiple Airlines
mar. 1/78:54 amBWI - SEA
3 stops31h 17mMultiple Airlines
Deal found 12/17$477
This Delta deal was found by Cheapflights users on 12/17. 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.
jue. 12/265:30 amSEA - DCA
1 stop7h 30mDelta
mar. 1/75:10 pmDCA - SEA
1 stop10h 40mDelta
Deal found 12/17$480
This United Airlines deal was found by Cheapflights users on 12/17. 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.
mié. 12/252:20 pmSEA - IAD
1 stop6h 39mUnited Airlines
jue. 1/912:40 pmIAD - SEA
1 stop8h 35mUnited Airlines
Deal found 12/17$480
This United Airlines deal was found by Cheapflights users on 12/17. 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.
mar. 12/311:55 pmSEA - DCA
1 stop17h 32mUnited Airlines
mar. 1/77:02 amDCA - SEA
1 stop8h 05mUnited Airlines
Deal found 12/17$526

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 2,558,603 searches. Data last updated diciembre 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

sáb. 1/25

9:54 am-5:57 pm

Nonstop5h 03m

Washington, D.C. Dulles Intl

sáb. 2/1

6:57 pm-10:00 pm

Nonstop6h 03m

$265

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

mar. 2/18

11:17 pm-11:35 am

1 stop9h 18m

Washington, D.C. Reagan-National

mar. 2/25

4:15 pm-10:38 pm

1 stop9h 23m

$268

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

jue. 1/9

9:52 am-5:59 pm

Nonstop5h 07m

Baltimore/Washington

dom. 1/12

8:08 am-5:00 pm

1 stop11h 52m

$269

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

vie. 1/31

2:05 pm-9:59 pm

Nonstop4h 54m

Washington, D.C. Reagan-National

vie. 2/7

7:00 am-2:25 pm

1 stop10h 25m

$269

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

mar. 1/14

7:10 am-5:00 am

1 stop18h 50m

Baltimore/Washington

mar. 1/21

7:32 pm-12:19 am

2 stops31h 47m

$270

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

lun. 1/13

7:00 am-8:40 pm

1 stop10h 40m

Washington, D.C. Dulles Intl

sáb. 1/18

5:30 pm-8:31 pm

Nonstop6h 01m

$270

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

mié. 1/1

7:05 pm-5:47 am

1 stop7h 42m

Baltimore/Washington

mié. 1/8

5:33 pm-10:25 pm

1 stop7h 52m

$271

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

jue. 3/6

2:02 pm-12:03 pm

1 stop19h 01m

Washington, D.C. Reagan-National

dom. 3/9

1:03 pm-12:02 pm

1 stop25h 59m

$271

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

sáb. 2/1

7:10 am-3:10 pm

Nonstop5h 00m

Washington, D.C. Dulles Intl

sáb. 2/8

6:00 am-10:45 am

1 stop7h 45m

$275

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

sáb. 1/11

7:14 am-7:50 pm

1 stop9h 36m

Washington, D.C. Reagan-National

sáb. 1/18

11:40 am-7:10 pm

1 stop10h 30m

$276

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 45 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 December.
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*2 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
GotogatePrice Accuracy2 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 December 13, 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 65 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, November is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of $299). Flying from Seattle to Washington, D.C. in June is currently the most expensive (average of $377). 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 diciembre 18, 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 19% 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 December 16, 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. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 diciembre 18, 2024.
See what other customers who have flown with Alaska Airlines, United Airlines and American 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.
8.1
Very good
4,848 reviews

Entertainment

7.7

Boarding

8.2

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

8.1
Very good
4,848 reviews
8.1
Very good
4,848 reviews

Entertainment

7.7

Boarding

8.2

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

8.0
Very good
9,552 reviews
8.1
Very good
4,848 reviews

Entertainment

7.7

Boarding

8.2

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

8.0
Very good
8,604 reviews
8.1
Very good
4,848 reviews

Entertainment

7.7

Boarding

8.2

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

7.4
Good
3,279 reviews
8.1
Very good
4,848 reviews

Entertainment

7.7

Boarding

8.2

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

7.4
Good
9,059 reviews
8.1
Very good
4,848 reviews

Entertainment

7.7

Boarding

8.2

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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.. 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 6 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 Alaska Airlines. Our recent data shows that you can find tickets from as low as $265 on this airline. Additional options worth looking into are JetBlue and Spirit Airlines, starting at $268 and $270 round-trip. Alaska Airlines is currently priced 34% 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 Alaska Airlines, with whom users have recently found tickets for as low as $144. However, be on the lookout for offers from United Airlines and Delta, 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.?

  • 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 Copa Airlines (98%), United Airlines (94%) or Ethiopian Air (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 $839, our data shows the cheapest flight currently is $141. When looking at the most popular route, (Seattle/Tacoma Intl - Washington, D.C. Dulles Intl), you can expect to pay $177 for that flight.

  • 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?

    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 $60.

  • 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?

    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, November is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of $299). Flying from Seattle to Washington, D.C. in June is currently the most expensive (average of $377). 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 9 airlines flying from Seattle to Washington, D.C.

Discover the top 9 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 2,558,603 searches. Data last updated diciembre 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$86Average$225FlexibilityNo cancel feeOn-time62%
DeltaCheapest$152Average$483FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$169Average$534FlexibilityNo cancel feeOn-time83%
Spirit AirlinesCheapest$192Average$268FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$215Average$519FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$222Average$506FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$237Average$433FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$475FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$248Average$315FlexibilityNo cancel feeOn-time62%
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