Cheap flights from Seattle to Washington, D.C. from $137

Round-trip
1 adult
Economy
From?
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Mon 7/4
Mon 7/11

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Flight information for Seattle to Washington, D.C.
(SEA to WAS)

Find info about flight duration, direct flights, and airports for your flight from Seattle to Washington, D.C.

Best Price Found

$137

Fastest flight time

4h 56m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun

Airports in Washington, D.C.

2 airports
The best one-way flight to Washington, D.C. from Seattle in the past 72 hours is $137. The best round-trip flight deal from Seattle to Washington, D.C. found on momondo in the last 72 hours is $274.
The fastest flight from Seattle to Washington, D.C. takes 4h 56m
Direct flights go from Seattle to Washington, D.C. on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is Alaska Airlines.
There are 2 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Washington, D.C. Dulles Intl (IAD)

How to get the cheapest flight ticket from Seattle to Washington, D.C.

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

February

The cheapest time of year to fly to Washington, D.C. from Seattle is February. Most expensive is June

What is the cheapest day to depart Seattle for Washington, D.C.?

Wednesday

The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday

When is the cheapest time to fly from Seattle to Washington, D.C.?

in the afternoon

Seattle to Washington, D.C. flights are approximately 36% more expensive at noon than in the afternoon

What is the cheapest airline that flies to Washington, D.C. from Seattle?

Juneyao Airlines

Alaska Airlines, American Airlines, and Frontier are the most popular carriers operating from Seattle to Washington, D.C.

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

Seattle/Tacoma Intl - Baltimore/Washington

Fly from Seattle/Tacoma Intl to Baltimore/Washington for the best Seattle - Washington, D.C. flight prices

How far in advance should you book Seattle to Washington, D.C. flights?

55 days before

The cheapest time to buy a flight from Seattle to Washington, D.C. is approximately 55 days to departure

If you are looking to fly from Seattle to Washington, D.C., you are most likely going to fly from Seattle/Tacoma Intl Airport to Washington, D.C. Dulles Intl Airport, the most popular airports on that route. When traveling from Seattle, it is helpful to have an alternative airport to fly into when you land in Washington, D.C.. The nearest airport to Washington, D.C. Dulles Intl Airport is Washington, D.C. Reagan-National Airport which is located in Washington, D.C.. In June, $326 is typically the cheapest round trip price you’ll find from Seattle to Washington, D.C. which you can find when you fly SEA — DCA.

Seattle/Tacoma Intl Airport (SEA) to Washington, D.C. Dulles Intl Airport (IAD)$330
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Seattle/Tacoma Intl Airport (SEA) to Washington, D.C. Reagan-National Airport (DCA)$326
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Easily compare round-trip flights from Seattle to Washington, D.C.

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Seattle to Washington, D.C. by changing tabs
American Airlines
Sep 20
SEA6:16 pmSeattle/Tacoma Intl
9h 54m
2 stops
DCA4:10 amWashington, D.C. Reagan-National
Sep 21
DCA9:52 amWashington, D.C. Reagan-National
10h 13m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
Multiple Airlines
Oct 24
SEA8:30 pmSeattle/Tacoma Intl
6h 57m
1 stop
BWI3:27 amBaltimore/Washington
Oct 29
BWI9:37 amBaltimore/Washington
10h 35m
1 stop
SEA8:12 pmSeattle/Tacoma Intl
Delta
Oct 5
SEA7:50 amSeattle/Tacoma Intl
8h 38m
1 stop
BWI4:28 pmBaltimore/Washington
Oct 12
BWI1:39 pmBaltimore/Washington
10h 19m
1 stop
SEA11:58 pmSeattle/Tacoma Intl
Spirit Airlines
Sep 3
SEA8:00 amSeattle/Tacoma Intl
15h 20m
1 stop
BWI11:20 pmBaltimore/Washington
Sep 7
BWI1:48 pmBaltimore/Washington
8h 37m
1 stop
SEA10:25 pmSeattle/Tacoma Intl
Frontier
Aug 25
SEA5:14 pmSeattle/Tacoma Intl
12h 14m
1 stop
DCA5:28 amWashington, D.C. Reagan-National
Aug 30
DCA9:18 amWashington, D.C. Reagan-National
9h 08m
1 stop
SEA6:26 pmSeattle/Tacoma Intl
JetBlue
Oct 25
SEA6:45 pmSeattle/Tacoma Intl
7h 52m
1 stop
DCA2:37 amWashington, D.C. Reagan-National
Oct 29
DCA11:30 amWashington, D.C. Reagan-National
8h 55m
1 stop
SEA8:25 pmSeattle/Tacoma Intl

Find the cheapest one-way flights from Seattle to Washington, D.C.

If you're looking for one-way flights from Seattle to Washington, D.C., view some of our deals below provided by American Airlines, Delta and Spirit Airlines
American Airlines
Oct 18
SEA6:16 pmSeattle/Tacoma Intl
9h 56m
1 stop
BWI4:12 amBaltimore/Washington
Delta
Oct 19
SEA8:01 amSeattle/Tacoma Intl
8h 23m
1 stop
BWI4:24 pmBaltimore/Washington
Spirit Airlines
Aug 31
SEA8:00 amSeattle/Tacoma Intl
15h 20m
1 stop
BWI11:20 pmBaltimore/Washington

Search last-minute flights to Washington, D.C. from Seattle

Find and compare round-trip flight prices for your last-minute flight from Seattle to Washington, D.C.
Multiple Airlines
Jul 4
SEA8:27 amSeattle/Tacoma Intl
14h 56m
1 stop
BWI11:23 pmBaltimore/Washington
Jul 22
BWI4:00 amBaltimore/Washington
13h 52m
1 stop
SEA5:52 pmSeattle/Tacoma Intl
Spirit Airlines
Jul 5
SEA8:27 amSeattle/Tacoma Intl
15h 03m
1 stop
BWI11:30 pmBaltimore/Washington
Jul 11
BWI3:55 pmBaltimore/Washington
18h 14m
1 stop
SEA10:09 amSeattle/Tacoma Intl
Frontier
Jul 8
SEA3:58 pmSeattle/Tacoma Intl
7h 32m
1 stop
BWI11:30 pmBaltimore/Washington
Jul 22
BWI4:00 amBaltimore/Washington
13h 52m
1 stop
SEA5:52 pmSeattle/Tacoma Intl
American Airlines
Jul 7
SEA3:25 amSeattle/Tacoma Intl
8h 43m
1 stop
DCA12:08 pmWashington, D.C. Reagan-National
Jul 11
DCA1:50 pmWashington, D.C. Reagan-National
9h 18m
1 stop
SEA11:08 pmSeattle/Tacoma Intl
JetBlue
Jul 8
SEA6:53 pmSeattle/Tacoma Intl
7h 42m
1 stop
DCA2:35 amWashington, D.C. Reagan-National
Jul 18
DCA9:29 amWashington, D.C. Reagan-National
9h 34m
1 stop
SEA7:03 pmSeattle/Tacoma Intl
Alaska Airlines
Jul 5
SEA6:05 amSeattle/Tacoma Intl
5h 05m
IAD11:10 amWashington, D.C. Dulles Intl
Jul 7
IAD3:15 pmWashington, D.C. Dulles Intl
5h 50m
SEA9:05 pmSeattle/Tacoma Intl

Best airlines flying from Seattle to Washington, D.C.

Compare and see reviews for airlines that fly from Seattle to Washington, D.C. with momondo
AirlineRatingFree CancellationPrice
Juneyao AirlinesPriceFrom $12Free CancellationRating
0.0
Search Juneyao Airlines flights
FrontierPriceFrom $78Free CancellationRating
6.2
6.4

Boarding

5.8

Comfort

7.0

Crew

4.7

Entertainment

5.0

Food

Reviews

The cabin was HOT. We sat there for over 45 minutes with no air.

1 / 10
Search Frontier flights
Alaska AirlinesPriceFrom $119Free CancellationRating
7.9
8.2

Boarding

7.9

Comfort

8.5

Crew

7.2

Entertainment

7.1

Food

Reviews

I liked the crew. The seats were a bit tight, I did not like that

1 / 10
Search Alaska Airlines flights
DeltaPriceFrom $125Free CancellationRating
7.8
7.9

Boarding

8.0

Comfort

8.3

Crew

7.7

Entertainment

7.3

Food

Reviews

This is another disease as if you have the Internet, you are ordinary deceivers!

1 / 10
Search Delta flights
Sun Country AirPriceFrom $126Free CancellationRating
7.3
7.6

Boarding

7.4

Comfort

8.1

Crew

6.3

Entertainment

6.4

Food

Reviews

I paid extra to board zone 1 they called zone 1-3 at the same time so that was pointless. Crew was unfriendly and I felt like an inconvenience. Wasn’t able to go to a gate had to take a shuttle to the gate and that process was a mess. I won’t fly sun country again unless it is an emergency.

1 / 10
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United AirlinesPriceFrom $131Free CancellationRating
7.2
7.5

Boarding

7.1

Comfort

8.0

Crew

6.9

Entertainment

6.5

Food

Reviews

Delayed too

1 / 10
Search United Airlines flights
American AirlinesPriceFrom $136Free CancellationRating
7.0
7.4

Boarding

7.1

Comfort

8.0

Crew

6.8

Entertainment

6.4

Food

Reviews

The hell with American. Don’t fly with these people.

1 / 10
Search American Airlines flights
JetBluePriceFrom $149Free CancellationRating
6.9
7.1

Boarding

7.4

Comfort

7.7

Crew

7.0

Entertainment

6.5

Food

Reviews

On smaller Embraer planes they still have old tvs with low quality with a guide you can scroll through on your armrest BUT they still work. They also still have wifi available on these planes, so that's really what matters

1 / 10
Search JetBlue flights
  • Alaska Airlines Flights From Seattle to Washington, D.C.

    Alaska Airlines is one of the most popular airlines flying from Seattle to Washington, D.C., operating 18 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to Washington, D.C. starts from $119 round-trip, up to an average price of $329. Our users have rated Alaska Airlines at 7.9/10.

  • Delta Flights From Seattle to Washington, D.C.

    Delta (7.8/10 from 392 reviews) operates around 1 flight from Seattle to Washington, D.C. in any given week. The average Delta airfare for this route is around $382, with deals from around $125 rare but found on momondo. Referenced prices are for round-trip Seattle to Washington, D.C. flight searches in the last 72 hours.


United Airlines flights from Seattle to Washington, D.C.

Our best United Airlines deals on Seattle to Washington, D.C. flight tickets
United Airlines
Dec 8
SEA6:05 amSeattle/Tacoma Intl
8h 55m
1 stop
BWI3:00 pmBaltimore/Washington
Dec 11
BWI3:45 amBaltimore/Washington
9h 25m
1 stop
SEA1:10 pmSeattle/Tacoma Intl
United Airlines
Nov 2
SEA8:51 amSeattle/Tacoma Intl
4h 48m
IAD1:39 pmWashington, D.C. Dulles Intl
Nov 9
IAD7:39 amWashington, D.C. Dulles Intl
29h 56m
2 stops
SEA1:35 pmSeattle/Tacoma Intl
United Airlines
Nov 24
SEA6:34 pmSeattle/Tacoma Intl
4h 48m
IAD11:22 pmWashington, D.C. Dulles Intl
Dec 2
IAD1:10 amWashington, D.C. Dulles Intl
9h 57m
1 stop
SEA11:07 amSeattle/Tacoma Intl

Delta flights from Seattle to Washington, D.C.

Our best Delta deals on Seattle to Washington, D.C. flight tickets
Delta
Oct 5
SEA7:50 amSeattle/Tacoma Intl
8h 38m
1 stop
BWI4:28 pmBaltimore/Washington
Oct 12
BWI1:39 pmBaltimore/Washington
10h 19m
1 stop
SEA11:58 pmSeattle/Tacoma Intl
Delta
Oct 21
SEA7:40 amSeattle/Tacoma Intl
10h 10m
1 stop
BWI5:50 pmBaltimore/Washington
Oct 25
BWI12:35 pmBaltimore/Washington
8h 44m
1 stop
SEA9:19 pmSeattle/Tacoma Intl
Delta
Aug 31
SEA10:15 amSeattle/Tacoma Intl
6h 40m
1 stop
BWI4:55 pmBaltimore/Washington
Sep 27
BWI1:41 pmBaltimore/Washington
10h 08m
1 stop
SEA11:49 pmSeattle/Tacoma Intl

  • Are airlines flying from Seattle/Tacoma Intl to Washington, D.C. offering flexible cancellation due to COVID-19?

    Due to the global impact of COVID-19, some of our airline partners operating flights from Seattle/Tacoma Intl to Washington, D.C., such as Alaska Airlines, Delta, and United Airlines may have put in place flexible cancellation policies. Use our site to search for all of the airlines offering this flexibility to you.

  • How far is Seattle/Tacoma Intl to Washington, D.C. by plane?

    There are 2320.5 mi between Seattle/Tacoma Intl and Washington, D.C.. 4h 48m is a normal flight duration for this route.



Similar Seattle to Washington, D.C. flights

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To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from Seattle.

Flights from Seattle to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

Once you have performed a search for Seattle to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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