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Cheap flights from Washington, D.C. to Seattle from $81

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Seattle departing on 5/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Easily compare round-trip flights from Washington, D.C. to Seattle

Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Washington, D.C. to Seattle by changing tabs
Frontier
May 10
DCA12:50 pmWashington, D.C. Reagan-National
11h 44m
1 stop
SEA9:34 pmSeattle/Tacoma Intl
May 17
SEA10:24 pmSeattle/Tacoma Intl
10h 39m
1 stop
DCA12:03 pmWashington, D.C. Reagan-National
Multiple Airlines
May 13
BWI9:20 pmBaltimore/Washington
14h 25m
1 stop
SEA8:45 amSeattle/Tacoma Intl
May 19
SEA8:04 amSeattle/Tacoma Intl
24h 29m
1 stop
BWI11:33 amBaltimore/Washington
Spirit Airlines
May 7
BWI2:25 pmBaltimore/Washington
21h 20m
1 stop
SEA8:45 amSeattle/Tacoma Intl
May 14
SEA9:40 pmSeattle/Tacoma Intl
12h 53m
1 stop
BWI1:33 pmBaltimore/Washington
American Airlines
Oct 1
BWI6:07 pmBaltimore/Washington
7h 43m
1 stop
SEA10:50 pmSeattle/Tacoma Intl
Oct 3
SEA7:37 amSeattle/Tacoma Intl
7h 13m
1 stop
BWI5:50 pmBaltimore/Washington
Sun Country Air
May 31
IAD6:20 pmWashington, D.C. Dulles Intl
7h 30m
1 stop
SEA10:50 pmSeattle/Tacoma Intl
Jun 2
SEA11:59 pmSeattle/Tacoma Intl
13h 32m
1 stop
IAD4:31 pmWashington, D.C. Dulles Intl
Delta
Oct 15
BWI4:36 pmBaltimore/Washington
8h 42m
1 stop
SEA10:18 pmSeattle/Tacoma Intl
Oct 23
SEA7:15 pmSeattle/Tacoma Intl
7h 43m
1 stop
BWI5:58 amBaltimore/Washington

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

If you're looking for one-way flights from Washington, D.C. to Seattle, view some of our deals below provided by Alaska Airlines, American Airlines and Frontier
Frontier
May 8
DCA7:00 amWashington, D.C. Reagan-National
12h 58m
1 stop
SEA4:58 pmSeattle/Tacoma Intl
Spirit Airlines
May 13
BWI9:20 pmBaltimore/Washington
14h 25m
1 stop
SEA8:45 amSeattle/Tacoma Intl
American Airlines
May 9
BWI5:00 amBaltimore/Washington
9h 08m
1 stop
SEA11:08 amSeattle/Tacoma Intl

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

Find and compare round-trip flight prices for your last-minute flight from Washington, D.C. to Seattle
Frontier
Apr 27
DCA7:00 amWashington, D.C. Reagan-National
9h 55m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
Apr 30
SEA9:35 pmSeattle/Tacoma Intl
11h 25m
1 stop
DCA12:00 pmWashington, D.C. Reagan-National
Multiple Airlines
Apr 26
BWI12:29 pmBaltimore/Washington
12h 05m
1 stop
SEA9:34 pmSeattle/Tacoma Intl
May 4
SEA3:07 pmSeattle/Tacoma Intl
13h 01m
1 stop
BWI7:08 amBaltimore/Washington
Sun Country Air
Apr 24
IAD12:00 pmWashington, D.C. Dulles Intl
7h 55m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
May 1
SEA4:45 pmSeattle/Tacoma Intl
15h 07m
1 stop
IAD10:52 amWashington, D.C. Dulles Intl
Spirit Airlines
Apr 24
BWI9:38 pmBaltimore/Washington
25h 51m
2 stops
SEA8:29 pmSeattle/Tacoma Intl
May 1
SEA9:19 pmSeattle/Tacoma Intl
20h 29m
2 stops
BWI8:48 pmBaltimore/Washington
American Airlines
Apr 24
BWI6:25 amBaltimore/Washington
9h 13m
1 stop
SEA12:38 pmSeattle/Tacoma Intl
Apr 29
SEA1:39 pmSeattle/Tacoma Intl
7h 19m
1 stop
BWI11:58 pmBaltimore/Washington
Delta
Apr 25
BWI6:15 pmBaltimore/Washington
7h 17m
1 stop
SEA10:32 pmSeattle/Tacoma Intl
May 3
SEA7:00 pmSeattle/Tacoma Intl
7h 33m
1 stop
BWI5:33 amBaltimore/Washington

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

Compare and see reviews for airlines that fly from Washington, D.C. to Seattle with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $119Free CancellationRating
7.6
4,678 reviews
Search JetBlue flights
FrontierPriceFrom $122Free CancellationRating
6.3
4,168 reviews
Search Frontier flights
DeltaPriceFrom $139Free CancellationRating
8.0
11,104 reviews
Search Delta flights
Spirit AirlinesPriceFrom $159Free CancellationRating
6.4
8,789 reviews
Search Spirit Airlines flights
Alaska AirlinesPriceFrom $168Free CancellationRating
8.1
9,106 reviews
Search Alaska Airlines flights
Sun Country AirPriceFrom $170Free CancellationRating
7.2
669 reviews
Search Sun Country Air flights
United AirlinesPriceFrom $176Free CancellationRating
7.4
11,341 reviews
Search United Airlines flights
American AirlinesPriceFrom $225Free CancellationRating
7.3
14,963 reviews
Search American Airlines flights
  • Alaska Airlines Flights From Washington, D.C. to Seattle

    Alaska Airlines flies from Washington, D.C. to Seattle around 19 times per week, with 9,106 momondo users rating the airline 8.1/10. The cheapest Alaska Airlines deal from Washington, D.C. to Seattle in the last 72 hours was $168 (round-trip), much lower than the average airfare cost of $484 for Alaska Airlines flights on this route.

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

    Across 11,104 Delta reviews on momondo, the average score is 8.0/10. Delta flies from Washington, D.C. to Seattle about 5 times each week, with ticket deals ranging from $139 to $444. Price data is based on momondo searches in the last 72 hours.


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

Our best United Airlines deals on Washington, D.C. to Seattle flight tickets
United Airlines
May 12
IAD8:45 amWashington, D.C. Dulles Intl
5h 48m
SEA11:33 amSeattle/Tacoma Intl
May 14
SEA7:15 amSeattle/Tacoma Intl
10h 47m
1 stop
IAD9:02 pmWashington, D.C. Dulles Intl
United Airlines
May 15
IAD4:03 pmWashington, D.C. Dulles Intl
9h 50m
1 stop
SEA10:53 pmSeattle/Tacoma Intl
May 22
SEA1:10 pmSeattle/Tacoma Intl
8h 55m
1 stop
IAD1:05 amWashington, D.C. Dulles Intl
United Airlines
May 13
IAD4:03 pmWashington, D.C. Dulles Intl
9h 50m
1 stop
SEA10:53 pmSeattle/Tacoma Intl
May 15
SEA4:47 pmSeattle/Tacoma Intl
9h 32m
1 stop
IAD5:19 amWashington, D.C. Dulles Intl

Frontier flights from Washington, D.C. to Seattle

Our best Frontier deals on Washington, D.C. to Seattle flight tickets
Frontier
May 10
DCA12:50 pmWashington, D.C. Reagan-National
11h 44m
1 stop
SEA9:34 pmSeattle/Tacoma Intl
May 17
SEA10:24 pmSeattle/Tacoma Intl
10h 39m
1 stop
DCA12:03 pmWashington, D.C. Reagan-National
Frontier
May 8
DCA7:00 amWashington, D.C. Reagan-National
12h 58m
1 stop
SEA4:58 pmSeattle/Tacoma Intl
May 16
SEA9:49 pmSeattle/Tacoma Intl
21h 10m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Frontier
May 7
DCA6:51 pmWashington, D.C. Reagan-National
25h 07m
1 stop
SEA4:58 pmSeattle/Tacoma Intl
May 13
SEA5:02 pmSeattle/Tacoma Intl
25h 57m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National

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

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 Washington, D.C. to Seattle?

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

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

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

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

At noon. Washington, D.C. to Seattle flights are approximately 29% more expensive in the morning than at noon

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

JetBlue. Delta, Frontier, and JetBlue are the most popular carriers operating from Washington, D.C. to Seattle

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

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

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

26 days before. The cheapest time to buy a flight from Washington, D.C. to Seattle is approximately 26 days to departure

How many flights depart from Washington, D.C. to Seattle on average per day?

As of April 2024, 19 flights take off from Washington, D.C. and land in Seattle each day. The most common flight departure time for this route is 4:00PM, with 68% of daily flights taking off in the afternoon.

How many flights depart from Washington, D.C. to Seattle on average per week?

As of April 2024, there are 135 flights per week flying from Washington, D.C. to Seattle. The most common day of the week flights depart is Friday, with 16% of flights taking off on this day.

What cabin class options are available on Washington, D.C. to Seattle flights?

There are 4 cabin classes available to choose from on Washington, D.C. to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. to Seattle flights?

You could potentially save up to 48% on your flight if you consider stops on a Washington, D.C. to Seattle flight.

Cheap Washington, D.C. to Seattle (WAS to SEA) flight deals and tips

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

Best Price Found

$81

Fastest flight time

5h 28m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Washington, D.C. in the past 72 hours is $81. The best round-trip flight deal from Washington, D.C. to Seattle found on momondo in the last 72 hours is $142.
The fastest flight from Washington, D.C. to Seattle takes 5h 28m
Direct flights go from Washington, D.C. to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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

    The straight-line distance from Washington, D.C. to Seattle/Tacoma Intl is 2320.5 mi. 5h 28m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Washington, D.C. to Seattle/Tacoma Intl Airport?

    Prices for flights from Washington, D.C. to Seattle/Tacoma Intl Airport were last updated today.

  • How many operators does momondo search for flights from Washington, D.C. to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Washington, D.C. to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.


Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Seattle?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Seattle for you.

Can I find flights from Washington, D.C. to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington, D.C. to Seattle flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington, D.C. to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Washington, D.C. and alert you when they change.


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