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Cheap flights from Washington, D.C. to Seattle from $79

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 8/28. 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
Aug 24
DCA6:59 pmWashington, D.C. Reagan-National
16h 38m
1 stop
SEA8:37 amSeattle/Tacoma Intl
Aug 31
SEA10:08 pmSeattle/Tacoma Intl
11h 01m
1 stop
DCA12:09 pmWashington, D.C. Reagan-National
Spirit Airlines
Jul 5
BWI9:28 pmBaltimore/Washington
13h 29m
1 stop
SEA7:57 amSeattle/Tacoma Intl
Jul 13
SEA6:29 pmSeattle/Tacoma Intl
9h 08m
1 stop
BWI6:37 amBaltimore/Washington
Multiple Airlines
Jul 15
BWI7:11 pmBaltimore/Washington
20h 23m
3 stops
SEA12:34 pmSeattle/Tacoma Intl
Aug 20
SEA5:00 pmSeattle/Tacoma Intl
10h 50m
1 stop
BWI6:50 amBaltimore/Washington
Delta
Jun 8
BWI5:13 pmBaltimore/Washington
7h 46m
1 stop
SEA9:59 pmSeattle/Tacoma Intl
Jun 12
SEA6:00 amSeattle/Tacoma Intl
7h 58m
1 stop
BWI4:58 pmBaltimore/Washington
Alaska Airlines
Aug 27
BWI7:08 amBaltimore/Washington
5h 43m
SEA9:51 amSeattle/Tacoma Intl
Sep 4
SEA9:37 pmSeattle/Tacoma Intl
5h 00m
BWI5:37 amBaltimore/Washington
JetBlue
Oct 29
DCA3:20 pmWashington, D.C. Reagan-National
10h 29m
1 stop
SEA10:49 pmSeattle/Tacoma Intl
Nov 12
SEA10:28 pmSeattle/Tacoma Intl
8h 18m
1 stop
DCA9:46 amWashington, D.C. Reagan-National

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 JetBlue
Spirit Airlines
Aug 28
BWI7:52 amBaltimore/Washington
11h 16m
1 stop
SEA4:08 pmSeattle/Tacoma Intl
American Airlines
Jun 11
BWI1:19 pmBaltimore/Washington
9h 18m
1 stop
SEA7:37 pmSeattle/Tacoma Intl
JetBlue
Sep 17
DCA12:30 pmWashington, D.C. Reagan-National
11h 36m
1 stop
SEA9:06 pmSeattle/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
American Airlines
Jun 4
BWI5:35 pmBaltimore/Washington
8h 06m
1 stop
SEA10:41 pmSeattle/Tacoma Intl
Jun 6
SEA5:53 amSeattle/Tacoma Intl
10h 33m
1 stop
BWI7:26 pmBaltimore/Washington
Frontier
Jun 6
BWI1:39 pmBaltimore/Washington
20h 27m
1 stop
SEA7:06 amSeattle/Tacoma Intl
Jun 12
SEA9:41 pmSeattle/Tacoma Intl
11h 58m
1 stop
BWI12:39 pmBaltimore/Washington
Spirit Airlines
Jun 8
BWI9:28 pmBaltimore/Washington
14h 04m
1 stop
SEA8:32 amSeattle/Tacoma Intl
Aug 27
SEA5:00 pmSeattle/Tacoma Intl
10h 50m
1 stop
BWI6:50 amBaltimore/Washington
Multiple Airlines
Jun 6
BWI1:39 pmBaltimore/Washington
20h 27m
1 stop
SEA7:06 amSeattle/Tacoma Intl
Jun 11
SEA9:41 pmSeattle/Tacoma Intl
14h 14m
1 stop
BWI2:55 pmBaltimore/Washington
Delta
Jun 8
BWI5:13 pmBaltimore/Washington
7h 46m
1 stop
SEA9:59 pmSeattle/Tacoma Intl
Jun 12
SEA6:00 amSeattle/Tacoma Intl
7h 58m
1 stop
BWI4:58 pmBaltimore/Washington
Sun Country Air
Jun 5
IAD11:20 amWashington, D.C. Dulles Intl
23h 42m
1 stop
SEA8:02 amSeattle/Tacoma Intl
Jun 12
SEA5:50 pmSeattle/Tacoma Intl
14h 56m
1 stop
IAD11:46 amWashington, D.C. Dulles Intl

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

Our best Spirit Airlines deals on Washington, D.C. to Seattle flight tickets
Spirit Airlines
Jul 5
BWI9:28 pmBaltimore/Washington
13h 29m
1 stop
SEA7:57 amSeattle/Tacoma Intl
Jul 13
SEA6:29 pmSeattle/Tacoma Intl
9h 08m
1 stop
BWI6:37 amBaltimore/Washington
Spirit Airlines
Jun 10
BWI9:28 pmBaltimore/Washington
14h 31m
1 stop
SEA8:59 amSeattle/Tacoma Intl
Jun 11
SEA9:41 pmSeattle/Tacoma Intl
8h 13m
1 stop
BWI8:54 amBaltimore/Washington
Spirit Airlines
Jul 15
BWI9:57 pmBaltimore/Washington
21h 18m
2 stops
SEA4:15 pmSeattle/Tacoma Intl
Jul 23
SEA5:15 pmSeattle/Tacoma Intl
10h 22m
1 stop
BWI6:37 amBaltimore/Washington

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

Our best United Airlines deals on Washington, D.C. to Seattle flight tickets
United Airlines
Sep 11
IAD5:40 pmWashington, D.C. Dulles Intl
8h 20m
1 stop
SEA11:00 pmSeattle/Tacoma Intl
Sep 21
SEA8:10 amSeattle/Tacoma Intl
5h 05m
IAD4:15 pmWashington, D.C. Dulles Intl
United Airlines
Sep 5
IAD5:40 pmWashington, D.C. Dulles Intl
8h 20m
1 stop
SEA11:00 pmSeattle/Tacoma Intl
Sep 14
SEA10:50 pmSeattle/Tacoma Intl
5h 05m
IAD6:55 amWashington, D.C. Dulles Intl
United Airlines
Aug 14
IAD10:10 pmWashington, D.C. Dulles Intl
5h 44m
SEA12:54 amSeattle/Tacoma Intl
Aug 17
SEA6:35 pmSeattle/Tacoma Intl
7h 50m
1 stop
IAD5:25 amWashington, D.C. Dulles Intl

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 27% more expensive in the morning than at noon

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

Frontier. 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?

Baltimore/Washington - Seattle/Tacoma Intl. Fly from Baltimore/Washington 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?

52 days before. The cheapest time to buy a flight from Washington, D.C. to Seattle is approximately 52 days to departure

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

As of May 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 60% of daily flights taking off in the afternoon.

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

As of May 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 42% 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

$79

Fastest flight time

5h 41m

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 $79. The best round-trip flight deal from Washington, D.C. to Seattle found on momondo in the last 72 hours is $227.
The fastest flight from Washington, D.C. to Seattle takes 5h 41m
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 42m 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.


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
FrontierPriceFrom $110Free CancellationRating
6.2
4,009 reviews
Search Frontier flights
JetBluePriceFrom $119Free CancellationRating
7.6
4,356 reviews
Search JetBlue flights
DeltaPriceFrom $139Free CancellationRating
8.0
10,430 reviews
Search Delta flights
Alaska AirlinesPriceFrom $145Free CancellationRating
8.0
9,201 reviews
Search Alaska Airlines flights
Spirit AirlinesPriceFrom $167Free CancellationRating
6.4
8,610 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $169Free CancellationRating
7.4
10,777 reviews
Search United Airlines flights
Sun Country AirPriceFrom $171Free CancellationRating
7.1
596 reviews
Search Sun Country Air flights
American AirlinesPriceFrom $225Free CancellationRating
7.3
14,284 reviews
Search American Airlines flights
  • Delta Flights From Washington, D.C. to Seattle

    Delta flies from Washington, D.C. to Seattle around 5 times per week, with 10,430 momondo users rating the airline 8.0/10. The cheapest Delta deal from Washington, D.C. to Seattle in the last 72 hours was $139 (round-trip), much lower than the average airfare cost of $427 for Delta flights on this route.

  • Alaska Airlines Flights From Washington, D.C. to Seattle

    Across 9,201 Alaska Airlines reviews on momondo, the average score is 8.0/10. Alaska Airlines flies from Washington, D.C. to Seattle about 19 times each week, with ticket deals ranging from $145 to $471. Price data is based on momondo searches in the last 72 hours.


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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