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SEA - WAS

£92 Find cheap flights from Seattle to Washington, D.C.

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Washington, D.C. departing on 4/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Thu 13/6
Thu 20/6

Search hundreds of travel sites at once for deals on flights to Washington, D.C.

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Washington, D.C., as well as popular online travel agencies
In the last 7 days, travellers have searched 42,566,405 times on KAYAK, and here's why:

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Cheap flight deals from Seattle to Washington, D.C. (SEA-WAS)

 
These are the cheapest deals for flights from Seattle to Washington, D.C. currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent return flight deals from Seattle to Washington, D.C.

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Seattle to Washington, D.C..

Recent one-way flight deals from Seattle to Washington, D.C.

Only flying one-way? Below are some of the best one-way flight deals from Seattle to Washington, D.C. found on KAYAK recently.

Recent last-minute flight deals from Seattle to Washington, D.C.

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Seattle to Washington, D.C..

Recent direct flight deals from Seattle to Washington, D.C.

The latest deals for direct flights from Seattle to Washington, D.C. so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Seattle to Washington, D.C.

Find recent round-trip train or bus tickets from Seattle to Washington, D.C..

All round-trip flight deals to Washington, D.C.

The cheapest plane tickets to Washington, D.C. found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
23:59 - 12:57SEA-IAD
9h 58m1 stop
18:10 - 09:22IAD-SEA
18h 12m1 stop
£219Sun Country Air
Find Deal
Thu, 13 Jun - Tue, 18 Jun
22:00 - 05:56SEA-IAD
4h 56mdirect
07:50 - 10:44IAD-SEA
5h 54mdirect
£221Delta
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Sat, 28 Sep - Tue, 15 Oct
22:00 - 05:56SEA-IAD
4h 56mdirect
07:50 - 10:44IAD-SEA
5h 54mdirect
£226Delta
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Mon, 30 Sep - Wed, 9 Oct
16:11 - 23:59SEA-IAD
4h 48mdirect
09:00 - 16:50IAD-SEA
10h 50m1 stop
£228Alaska Airlines
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Tue, 1 Oct - Tue, 15 Oct
16:06 - 23:59SEA-IAD
4h 53mdirect
09:00 - 14:59IAD-SEA
8h 59m1 stop
£233Alaska Airlines
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Wed, 11 Sep - Tue, 1 Oct
12:30 - 00:47SEA-IAD
9h 17m1 stop
22:15 - 00:59IAD-SEA
5h 44mdirect
£308United Airlines
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Wed, 5 Jun - Wed, 12 Jun
23:29 - 07:28SEA-IAD
4h 59mdirect
22:15 - 00:59IAD-SEA
5h 44mdirect
£310United Airlines
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Wed, 19 Jun - Sat, 22 Jun
20:40 - 08:45SEA-DCA
9h 05m1 stop
10:20 - 19:20DCA-SEA
12h 00m1 stop
£327JetBlue
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Fri, 14 Jun - Mon, 17 Jun
20:40 - 07:51SEA-DCA
8h 11m1 stop
10:20 - 19:20DCA-SEA
12h 00m1 stop
£393JetBlue
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Wed, 5 Jun - Thu, 13 Jun
05:20 - 14:55SEA-DCA
6h 35m1 stop
19:40 - 00:25DCA-SEA
7h 45m1 stop
£407Southwest
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Wed, 12 Jun - Wed, 19 Jun
20:40 - 09:45SEA-DCA
10h 05m1 stop
£92JetBlue
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Tue, 4 Jun
21:55 - 06:00SEA-IAD
5h 05mdirect
£111Delta
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Wed, 12 Jun
17:40 - 20:22SEA-IAD
23h 42m1 stop
£114Sun Country Air
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Fri, 24 May
05:45 - 17:05SEA-IAD
8h 20m1 stop
£118Alaska Airlines
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Tue, 4 Jun
11:45 - 10:21SEA-IAD
19h 36m1 stop
£122Sun Country Air
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Tue, 4 Jun
23:38 - 07:30SEA-IAD
4h 52mdirect
£143Alaska Airlines
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Thu, 13 Jun
22:30 - 06:29SEA-IAD
4h 59mdirect
£155United Airlines
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Mon, 5 Aug
00:30 - 10:39SEA-DCA
7h 09m1 stop
£163United Airlines
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Wed, 17 Jul
20:40 - 12:20SEA-IAD
12h 40m1 stop
£277Southwest
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Sun, 19 May
21:45 - 15:05SEA-DCA
14h 20m3 stops
£316Southwest
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Sun, 19 May
08:35 - 16:44SEA-IAD
5h 09mdirect
07:31 - 10:20IAD-SEA
5h 49mdirect
£416Delta
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Wed, 15 May - Tue, 4 Jun
13:30 - 23:53SEA-IAD
7h 23m1 stop
07:31 - 10:20IAD-SEA
5h 49mdirect
£423Delta
Find Deal
Wed, 15 May - Tue, 4 Jun
17:45 - 10:47SEA-IAD
14h 02m1 stop
12:30 - 07:55IAD-SEA
22h 25m1 stop
£431Sun Country Air
Find Deal
Wed, 15 May - Sun, 26 May
06:00 - 17:57SEA-IAD
8h 57m1 stop
07:00 - 22:50IAD-SEA
18h 50m1 stop
£458Alaska Airlines
Find Deal
Wed, 15 May - Tue, 4 Jun
00:40 - 11:05SEA-IAD
7h 25m1 stop
07:35 - 10:20IAD-SEA
5h 45mdirect
£517Delta
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Sun, 19 May - Tue, 21 May
00:40 - 11:05SEA-IAD
7h 25m1 stop
07:00 - 12:19IAD-SEA
8h 19m1 stop
£525Delta
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Sun, 19 May - Wed, 22 May
00:40 - 11:05SEA-IAD
7h 25m1 stop
07:35 - 10:20IAD-SEA
5h 45mdirect
£532Delta
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Sun, 19 May - Mon, 27 May
15:55 - 05:40SEA-IAD
10h 45m1 stop
09:05 - 11:35IAD-SEA
5h 30mdirect
£568Alaska Airlines
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Fri, 17 May - Wed, 22 May
08:06 - 16:10SEA-IAD
5h 04mdirect
12:35 - 15:22IAD-SEA
5h 47mdirect
£636United Airlines
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Thu, 16 May - Thu, 23 May
08:20 - 22:40SEA-DCA
11h 20m2 stops
12:54 - 19:16DCA-SEA
9h 22m1 stop
£655United Airlines
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Fri, 17 May - Tue, 21 May
22:00 - 05:56SEA-IAD
4h 56mdirect
17:20 - 20:12IAD-SEA
5h 52mdirect
£221Delta
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Sat, 28 Sep - Sat, 12 Oct
22:00 - 05:56SEA-IAD
4h 56mdirect
07:50 - 10:44IAD-SEA
5h 54mdirect
£226Delta
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Mon, 30 Sep - Tue, 15 Oct
22:00 - 05:56SEA-IAD
4h 56mdirect
17:20 - 20:12IAD-SEA
5h 52mdirect
£230Delta
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Mon, 16 Sep - Mon, 30 Sep
22:22 - 06:26SEA-IAD
5h 04mdirect
17:40 - 20:27IAD-SEA
5h 47mdirect
£245Delta
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Tue, 4 Jun - Wed, 5 Jun
16:11 - 23:59SEA-IAD
4h 48mdirect
07:02 - 09:53IAD-SEA
5h 51mdirect
£253Alaska Airlines
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Tue, 1 Oct - Sun, 6 Oct
16:06 - 23:59SEA-IAD
4h 53mdirect
07:00 - 09:39IAD-SEA
5h 39mdirect
£258Alaska Airlines
Find Deal
Wed, 28 Aug - Sun, 1 Sep
16:06 - 23:59SEA-IAD
4h 53mdirect
19:09 - 22:00IAD-SEA
5h 51mdirect
£258Alaska Airlines
Find Deal
Wed, 28 Aug - Mon, 2 Sep
12:45 - 20:44SEA-IAD
4h 59mdirect
22:15 - 00:59IAD-SEA
5h 44mdirect
£305United Airlines
Find Deal
Tue, 4 Jun - Thu, 6 Jun
23:29 - 07:28SEA-IAD
4h 59mdirect
22:15 - 00:59IAD-SEA
5h 44mdirect
£310United Airlines
Find Deal
Wed, 19 Jun - Sat, 22 Jun
23:29 - 07:28SEA-IAD
4h 59mdirect
22:15 - 00:59IAD-SEA
5h 44mdirect
£337United Airlines
Find Deal
Sun, 16 Jun - Sat, 22 Jun

Flights from Seattle to Washington, D.C. - Travel Insights & Trends

Get data-powered insights and trends into flights from Seattle to Washington, D.C. to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Seattle to Washington, D.C. flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for one-way flights from Seattle to Washington, D.C..
Our data shows that the cheapest route for a one-way flight from Seattle to Washington, D.C. cost £108 and was between Seattle and Washington, D.C. Dulles Intl Airport. On average, the best prices are found if you fly this route. The average price for a return flight for this route is £308.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Seattle to Washington, D.C., removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Seattle to Washington, D.C. is February, where tickets cost £260 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is £395 and £371 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Seattle to Washington, D.C., removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Seattle to Washington, D.C., you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 49 days before departure.

Which airlines provide the cheapest flights from Seattle to Washington, D.C.?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Seattle to Washington, D.C. found on KAYAK was with JetBlue for £92. Sun Country Air proposed a return connection from £219 and Delta from £221.

Which airlines fly most frequently between Seattle and Washington, D.C.?

Alaska Airlines connects Seattle to Washington, D.C. with up to 11 flights per day. Delta also offers 4 flights per day, while United Airlines follows with 4 flights per day.

How many flights are there between Seattle and Washington, D.C. per day?

Each day, there are between 19 and 22 nonstop flights that take off from Seattle and land in Washington, D.C., with an average flight time of 5h 05m. The most common departure time is 08:00 and most flights take off in the morning, while the most flights land at Washington, D.C. Dulles Intl Airport. Each week, there are 141 flights. The most frequent day of departure is Wednesday, when 16% of all weekly flights depart. The fewest flights depart on a Sunday.

Which cabin class options are there for flights between Seattle and Washington, D.C.?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Seattle to Washington, D.C. take?

Direct flights cover the 2,319 miles separating Seattle and Washington, D.C. in about 4h 48m.

What’s the earliest departure time from Seattle to Washington, D.C.?

Early birds can take the earliest flight from Seattle at 08:01 and will be landing in Washington, D.C. at 16:13.

What’s the latest departure time from Seattle to Washington, D.C.?

If you prefer to fly at night, the latest flight from Seattle to Washington, D.C. jets off at 23:38 and lands at 07:30.

Good to know - Cheap tickets from Seattle to Washington, D.C.

Low season

January

High season

April
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (1% more expensive on average)

When to book flights from Seattle to Washington, D.C.

Are your dates flexible? Find out the best times to travel from Seattle to Washington, D.C. based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Washington, D.C.

  • Does IAD have an on-site hotel?

    IAD has one on-site hotel. Referred to as Sleepbox Lounge, this hotel is between Gates A6 and A14, near the AeroTrain in Concourse A. You'll have a good rest at this hotel, as it features comfortable rooms.

  • Is there an on-site restaurant at DCA?

    If you're hungry, you can order food before exiting DCA, as this airport is full of restaurants. Some notable restaurants at this airport include Matsutake Sushi, American Tap Room, District Bar, Custom Burger, Cava Mezze Grill, and Grille District. If you just want snacks, you can visit the retail stores located throughout the airport.

  • Can I rent a car at BWI?

    If you want to rent a car once you disembark from your flight at BWI, you'll be able to do so. This is because BWI is connected to an off-site car rental facility that houses branches for reliable car rental agencies like Budget, Hertz, National, Alamo, Avis, Thrifty, and Enterprise. To board the shuttle, you'll use to travel to the airport's car rental facility, and head to the lower level of BWI's main terminal.

  • Does SEA have a children's play area?

    SEA has a children's play area. Located between the Central Terminal and Gates A, across from Seattle Taproom, this children's play area features several toys and soft playgrounds. Daily, it operates round-the-clock.

  • What is the cheapest flight from Seattle to Washington, D.C.?

    In the last 3 days, the lowest price for a flight from Seattle to Washington, D.C. was £115 for a one-way ticket and £275 for a return.

  • Which airlines offer Wi-Fi service onboard planes from Seattle to Washington, D.C.?

    Alaska Airlines, JetBlue, American Airlines, and Delta offer inflight Wi-Fi service on the Seattle to Washington, D.C. flight route.

  • Which aircraft models fly most regularly from Seattle to Washington, D.C.?

    The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Seattle to Washington, D.C. flight route.

  • Which airline alliances offer flights from Seattle to Washington, D.C.?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Seattle and Washington, D.C., with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Seattle to Washington, D.C.?

    There are direct flights from Seattle to Washington, D.C. on a daily basis.

  • How does KAYAK find such low prices on flights from Seattle to Washington, D.C.?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Washington, D.C..

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Washington, D.C.?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Washington, D.C.?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Washington, D.C. with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Washington, D.C.?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington, D.C. from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from Seattle to Washington, D.C.

  • To travel from Seattle's city center to Seattle-Tacoma International Airport (SEA), you can board a King County Metro bus, a private taxi, or a LINK Light Rail train. You should board a taxi if you're in a rush, a metro bus if you'd like to travel cheaply, and a train if you want to balance speed and cost.
  • In case you need help at SEA, you'll be able to easily get it, as this airport features several staff members mandated with the responsibility of assisting passengers at the airport. Given that they all wear distinct blue vests, you'll be able to spot one without hassle.
  • If you've got time to spare, while waiting for your flight to Washington at SEA, you can enjoy relaxing spa services at the outstanding Terminal Gateway Spa. This spa, situated a short distance from gate A5, is normally open from 7 am to 10 pm. It features adequately experienced professionals, state-of-the-art spa equipment, and high-quality spa oils.
  • In Washington, you can land at Baltimore/Washington International Thurgood Marshall Airport (BWI), Dulles International Airport (IAD), or Ronald Reagan Washington National Airport (DCA). When booking your flight to Washington, you should book one that lands at DCA. This is because, among the three Washington airports, it is the closest to Washington's city center. Given that it also has the least passenger traffic, you won't encounter massive queues at DCA.
  • If you've traveled to Washington with your pet, you can let it relieve itself in one of DCA's designated pet relief areas once you land at the airport. These pet relief areas are opposite Doors 1 and 5 in Terminal A, opposite the South Metrorail station entrance in Terminal B, and across from the North Metrorail Station Entrance in Terminal C.
See more tips

Prefer to fly direct from Seattle to Washington, D.C.?

Find which airlines fly direct from Seattle/Tacoma Intl to Washington, D.C., which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to Washington, D.C.

Monday

ANA, Air Tahiti Nui, Alaska Airlines, +13 more

ANA, Air Tahiti Nui, +14 more

Tuesday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

Wednesday

ANA, Air Tahiti Nui, Alaska Airlines, +13 more

ANA, Air Tahiti Nui, +14 more

Thursday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

Friday

ANA, Air Tahiti Nui, Alaska Airlines, +14 more

ANA, Air Tahiti Nui, +15 more

Saturday

ANA, Air Tahiti Nui, Alaska Airlines, +15 more

ANA, Air Tahiti Nui, +16 more

Sunday

ANA, Air Tahiti Nui, Alaska Airlines, +14 more

ANA, Air Tahiti Nui, +15 more

See more direct flights

Direct returns

Washington, D.C. to Seattle/Tacoma Intl

Monday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +12 more

Air Tahiti Nui, Alaska Airlines, +13 more

Tuesday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +13 more

Air Tahiti Nui, Alaska Airlines, +14 more

Wednesday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +12 more

Air Tahiti Nui, Alaska Airlines, +13 more

Thursday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +13 more

Air Tahiti Nui, Alaska Airlines, +14 more

Friday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +12 more

Air Tahiti Nui, Alaska Airlines, +13 more

Saturday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +13 more

Air Tahiti Nui, Alaska Airlines, +14 more

Sunday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +12 more

Air Tahiti Nui, Alaska Airlines, +13 more

See more direct flights
See more direct flights

Book cheap flights from Seattle to Washington, D.C.

Cheapest flights to Washington, D.C. from Seattle found in 2024

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to Washington, D.C. found on KAYAK in the last 72 hours.
4/6Tue
1 stopJetBlue
10h 05mSEA-DCA
£92
12/6Wed
directDelta
5h 05mSEA-IAD
£111
24/5Fri
1 stopSun Country Air
23h 42mSEA-IAD
£114
4/6Tue
1 stopAlaska Airlines
8h 20mSEA-IAD
£118
4/6Tue
1 stopSun Country Air
19h 36mSEA-IAD
£122
13/6Thu
directAlaska Airlines
4h 52mSEA-IAD
£143
5/8Mon
directUnited Airlines
4h 59mSEA-IAD
£155
17/7Wed
1 stopUnited Airlines
7h 09mSEA-DCA
£163
19/5Sun
1 stopSouthwest
12h 40mSEA-IAD
£277
19/5Sun
3 stopsSouthwest
14h 20mSEA-DCA
£316

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Last minute flights from Seattle to Washington, D.C.

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Seattle to Washington, D.C. that are departing in the next 10 days.
15/5Wed
directDelta
5h 09mSEA-IAD
4/6Tue
directDelta
5h 49mIAD-SEA
£416
15/5Wed
multi-stopDelta
7h 23mSEA-IAD
4/6Tue
directDelta
5h 49mIAD-SEA
£423
15/5Wed
multi-stopSun Country Air
14h 02mSEA-IAD
26/5Sun
multi-stopSun Country Air
22h 25mIAD-SEA
£431
15/5Wed
multi-stopAlaska Airlines
8h 57mSEA-IAD
4/6Tue
multi-stopAlaska Airlines
18h 50mIAD-SEA
£458
19/5Sun
multi-stopDelta
7h 25mSEA-IAD
21/5Tue
directDelta
5h 45mIAD-SEA
£517
19/5Sun
multi-stopDelta
7h 25mSEA-IAD
22/5Wed
multi-stopDelta
8h 19mIAD-SEA
£525
19/5Sun
multi-stopDelta
7h 25mSEA-IAD
27/5Mon
directDelta
5h 45mIAD-SEA
£532
17/5Fri
multi-stopAlaska Airlines
10h 45mSEA-IAD
22/5Wed
directAlaska Airlines
5h 30mIAD-SEA
£568
16/5Thu
directUnited Airlines
5h 04mSEA-IAD
23/5Thu
directUnited Airlines
5h 47mIAD-SEA
£636
17/5Fri
multi-stopUnited Airlines
11h 20mSEA-DCA
21/5Tue
multi-stopUnited Airlines
9h 22mDCA-SEA
£655

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Seattle - Washington, D.C. Flights

Departure:

Seattle (undefined)United States

Cabin classes:

£308

Browse origins:

  • Flights » 
  • Seattle

Browse destinations:

  • Flights » 
  • Worldwide » 
  • Washington, D.C.