Find Cheap Flights from Washington, D.C. to Seattle (WAS - SEA)

Flights overview

Useful information for finding cheap flights from Washington, D.C. to Seattle and booking your next trip

Cheapest round-trip flights	$230	Frontier 1 stop 28 hr Thu, Jul 30 — Wed, Aug 5	The cheapest round-trip flight from Washington, D.C. to Seattle is currently $230
Cheapest one-way flight	$111	Frontier 1 stop 28 hr Wed, Jul 8	The cheapest one-way flight from Washington, D.C. to Seattle is currently $111
Cheapest nonstop flights	$291	United Nonstop 6 hr Thu, May 28 — Thu, Jun 4	The cheapest nonstop round-trip flight from Washington, D.C. to Seattle is currently $291
Last-minute weekend getaway	$390	Frontier 1 stop 30 hr Thu, May 7 — Sun, May 10	The cheapest last-minute weekend getaway from Washington, D.C. to Seattle is currently $390
Cheapest business class flights	$498	Frontier 1 stop 23 hr Thu, Jul 30 — Wed, Aug 5	The cheapest business class round-trip flight from Washington, D.C. to Seattle is currently $498

Fastest flight	5 hr 41 min	The fastest nonstop flight from Washington, D.C. to Seattle takes 5 hr 41 min
Nonstop flights	Every day	There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from Washington, D.C. to Seattle is typically January. The most expensive month to fly is typically July.

January Cheapest	Typical prices: $170–370
July Most expensive	Typical prices: $250–340

Popular airlines from Washington, D.C. to Seattle

Alaska

Nonstop

from $291

Typical price: $265–650

45 weekly nonstop flights

BWI, DCA, IAD - SEA Every day

45 weekly connecting flights

DCA, IAD - SEA Every day
United

Nonstop

from $237

Typical price: $235–530

19 weekly nonstop flights

IAD - SEA Every day

903 weekly connecting flights

BWI, DCA, IAD - SEA Every day
Delta

Nonstop

from $291

Typical price: $230–620

14 weekly nonstop flights

DCA, IAD - SEA Every day

1021 weekly connecting flights

BWI, DCA, IAD - SEA Every day
Southwest

from $265

Typical price: $265–570

554 weekly connecting flights

BWI, DCA, IAD - SEA Every day
American

from $305

Typical price: $245–580

546 weekly connecting flights

BWI, DCA, IAD - SEA Every day
Frontier

from $230

Typical price: $220–580

58 weekly connecting flights

BWI, DCA, IAD - SEA Every day

Popular airports near Washington, D.C.

Ronald Reagan Washington National Airport (DCA)

Washington United States 19 min 4 mi
Dulles International Airport (IAD)

Washington United States 54 min 22 mi
Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI)

Baltimore United States 47 min 27 mi
Philadelphia International Airport (PHL)

Philadelphia United States 2 hr 18 min 116 mi

Popular airports near Seattle

Seattle-Tacoma International Airport (SEA)

Seattle United States 18 min 11 mi
Portland International Airport (PDX)

Portland United States 2 hr 44 min 140 mi
Paine Field (PAE)

Everett United States 31 min 21 mi
King County International Airport - Boeing Field (BFI)

Seattle United States 11 min 5 mi

Frequently asked questions about flying from Washington, D.C. to Seattle

The cheapest flights from Washington, D.C. to Seattle are usually in January. Typical ticket prices in January range from $170 to $370.

The cheapest round-trip flight from Washington, D.C. to Seattle recently found on Google Flights was with Frontier from $230. The cheapest one-way flight was with Frontier from $111.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest Alaska flight from Washington, D.C. to Seattle is $291, flying from May 28 to Jun 4.
The cheapest United flight from Washington, D.C. to Seattle is $237, flying from May 28 to Jun 3.
The cheapest Delta flight from Washington, D.C. to Seattle is $291, flying from May 30 to Jun 5.
The cheapest Southwest flight from Washington, D.C. to Seattle is $265, flying from Jul 25 to Jul 31.
The cheapest American flight from Washington, D.C. to Seattle is $305, flying from May 28 to Jun 3.
The cheapest Frontier flight from Washington, D.C. to Seattle is $230, flying from Jul 30 to Aug 5.

The cheapest round-trip flight from Washington, D.C. to Seattle starts at $230 from Thu, Jul 30 to Wed, Aug 5. The cheapest one-way flight starts at $111 and departs on Wed, Jul 8.

5 hr 41 min is the shortest flight time from Washington, D.C. to Seattle.

Most visitors come May–Sep, a period encompassing events such as the Seattle International Film Festival (May); Seafair (Jul), a summer festival including boat races, marathons and parades; and Bumbershoot (Sep), an international music and arts festival. Rainy season is Nov–May, though rain is possible year-round.

It's easy to use Google Flights to find the cheapest days to fly from Washington, D.C. to Seattle.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.

What counts as the best airline for your flights from Washington, D.C. to Seattle really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from Washington, D.C. to Seattle.

In terms of nonstop flights, Alaska is the most popular. Alaska offers 45 nonstop flights and 45 connecting flights per week. Alaska flies from Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) , Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) to Seattle-Tacoma International Airport (SEA) .

In terms of flights, Delta is the most popular. Delta offers 14 nonstop flights and 1,021 connecting flights per week. Delta flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA) .

Other popular airlines flying from Washington, D.C. to Seattle are:

United offers 19 nonstop flights and 903 connecting flights per week. United flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA) .
Southwest offers 554 connecting flights per week. Southwest flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA) .
American offers 546 connecting flights per week. American flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA) .
Frontier offers 58 connecting flights per week. Frontier flies from Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA) .

The number of connecting flights refers to distinct flights with at least one stop between Washington, D.C. and Seattle.

The cheapest round-trip flight from Washington, D.C. to Seattle recently found on Google Flights was with Frontier from $230. The cheapest one-way flight was with Frontier from $111.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest Alaska flight from Washington, D.C. to Seattle is $291, flying from May 28 to Jun 4.
The cheapest United flight from Washington, D.C. to Seattle is $237, flying from May 28 to Jun 3.
The cheapest Delta flight from Washington, D.C. to Seattle is $291, flying from May 30 to Jun 5.
The cheapest Southwest flight from Washington, D.C. to Seattle is $265, flying from Jul 25 to Jul 31.
The cheapest American flight from Washington, D.C. to Seattle is $305, flying from May 28 to Jun 3.
The cheapest Frontier flight from Washington, D.C. to Seattle is $230, flying from Jul 30 to Aug 5.

Alaska, Delta and United fly direct from Washington, D.C. to Seattle.

There are 45 Alaska direct flights from Washington, D.C. to Seattle per week. Flights are available every day.
There are 19 United direct flights from Washington, D.C. to Seattle per week. Flights are available every day.
There are 14 Delta direct flights from Washington, D.C. to Seattle per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

The cheapest last-minute deal between Washington, D.C. and Seattle at price $390 is offered by Frontier from Thu, May 7 to Sun, May 10.

Alaska, Delta and United fly direct from Washington, D.C. to Seattle.

There are 45 Alaska direct flights from Washington, D.C. to Seattle per week. Flights are available every day.
There are 19 United direct flights from Washington, D.C. to Seattle per week. Flights are available every day.
There are 14 Delta direct flights from Washington, D.C. to Seattle per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

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

The cheapest direct (nonstop) round-trip flights between Washington, D.C. and Seattle start at $291 from Thu, May 28 to Thu, Jun 4 with United.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Washington, D.C. to Seattle, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.

The cheapest business class round-trip flights between Washington, D.C. and Seattle start at $498 from Thu, Jul 30 to Wed, Aug 5 with Frontier.

The cheapest economy class round-trip flights between Washington, D.C. and Seattle start at $230 from Thu, Jul 30 to Wed, Aug 5.

To book business class trips from Washington, D.C. to Seattle, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.

The best last-minute getaway deal for the next weekend between Washington, D.C. and Seattle starts at $390 from Thu, May 7 to Sun, May 10 with Frontier.

The cheapest last-minute deal between Washington, D.C. and Seattle at price $390 is offered by Frontier from Thu, May 7 to Sun, May 10.

To find last-minute flight deals from Washington, D.C. to Seattle, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.