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

Flights overview

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

Cheapest round-trip flights	$165	Frontier 1 stop 30 hr Thu, Feb 19 — Sat, Feb 28	The cheapest round-trip flight from Seattle to Washington, D.C. is currently $165
Cheapest one-way flight	$85	United 1 stop 12 hr Sat, Feb 21	The cheapest one-way flight from Seattle to Washington, D.C. is currently $85
Cheapest nonstop flights	$199	Alaska Nonstop 5 hr Thu, Feb 19 — Wed, Feb 25	The cheapest nonstop round-trip flight from Seattle to Washington, D.C. is currently $199
Last-minute weekend getaway	$418	American 1 stop 9 hr Sat, Jan 24 — Sun, Jan 25	The cheapest last-minute weekend getaway from Seattle to Washington, D.C. is currently $418
Cheapest business class flights	$931	Delta Nonstop 5 hr Thu, Feb 19 — Sat, Feb 28	The cheapest business class round-trip flight from Seattle to Washington, D.C. is currently $931

Fastest flight	4 hr 50 min	The fastest nonstop flight from Seattle to Washington, D.C. takes 4 hr 50 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 Seattle to Washington, D.C. is typically January. The most expensive month to fly is typically July.

January Cheapest	Typical prices: $165–325
July Most expensive	Typical prices: $250–355

Popular airlines from Seattle to Washington, D.C.

Delta

Nonstop

from $197

Typical price: $235–600

14 weekly nonstop flights

SEA - DCA, IAD Every day

854 weekly connecting flights

SEA - BWI, DCA, IAD Every day
Alaska

Nonstop

from $199

Typical price: $275–610

28 weekly nonstop flights

SEA - BWI, DCA, IAD Every day

46 weekly connecting flights

SEA - DCA, IAD Every day
United

Nonstop

from $199

Typical price: $255–530

7 weekly nonstop flights

SEA - IAD Every day

549 weekly connecting flights

SEA - BWI, DCA, IAD Every day
American

from $179

Typical price: $250–570

428 weekly connecting flights

SEA - BWI, DCA, IAD Every day
Southwest

from $179

Typical price: $285–580

276 weekly connecting flights

SEA - BWI, DCA, IAD Every day
Frontier

from $165

Typical price: $210–520

21 weekly connecting flights

SEA - BWI, DCA, IAD Every Mon, Thu, Fri, Sun

Popular airports near Seattle

Seattle-Tacoma International Airport (SEA)

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

Portland United States 2 hr 44 min 140 mi

Popular airports near Washington, D.C.

Ronald Reagan Washington National Airport (DCA)

Washington United States 18 min 4 mi
Dulles International Airport (IAD)

Washington United States 52 min 22 mi
Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI)

Baltimore United States 49 min 27 mi
Philadelphia International Airport (PHL)

Philadelphia United States 2 hr 20 min 116 mi

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

The cheapest flights from Seattle to Washington, D.C. are usually in January. Typical ticket prices in January range from $165 to $325.

The cheapest round-trip flight from Seattle to Washington, D.C. recently found on Google Flights was with Frontier from $165. The cheapest one-way flight was with United from $85.

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

The cheapest Delta flight from Seattle to Washington, D.C. is $197, flying from Feb 21 to Mar 2.
The cheapest Alaska flight from Seattle to Washington, D.C. is $199, flying from Feb 19 to Feb 25.
The cheapest United flight from Seattle to Washington, D.C. is $199, flying from Feb 26 to Mar 4.
The cheapest American flight from Seattle to Washington, D.C. is $179, flying from Feb 19 to Feb 25.
The cheapest Southwest flight from Seattle to Washington, D.C. is $179, flying from Feb 19 to Feb 25.
The cheapest Frontier flight from Seattle to Washington, D.C. is $165, flying from Feb 19 to Feb 28.

The cheapest round-trip flight from Seattle to Washington, D.C. starts at $165 from Thu, Feb 19 to Sat, Feb 28. The cheapest one-way flight starts at $85 and departs on Sat, Feb 21.

4 hr 50 min is the shortest flight time from Seattle to Washington, D.C..

Mid-Mar–Jun is Washington DC's busiest time, with many people timing their visits to coincide with cherry blossom season (late Mar–mid Apr). Washington DC’s conference centers and hotels also bustle while Congress is in session (Sep–Nov and mid-Jan–Jun). Jul–Aug tend to be hot and humid, while snowfall can vary widely in winter. The city’s most popular events are the annual Cherry Blossom Festival in spring, the 4th of July celebration in summer, and the lighting of the National Christmas Tree in winter.

It's easy to use Google Flights to find the cheapest days to fly from Seattle to Washington, D.C..
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 Seattle to Washington, D.C. 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 Seattle to Washington, D.C..

In terms of nonstop flights, Alaska is the most popular. Alaska offers 28 nonstop flights and 46 connecting flights per week. Alaska flies from Seattle-Tacoma International Airport (SEA) to Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) , Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) .

In terms of flights, Delta is the most popular. Delta offers 14 nonstop flights and 854 connecting flights per week. Delta flies from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .

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

United offers 7 nonstop flights and 549 connecting flights per week. United flies from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .
American offers 428 connecting flights per week. American flies from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .
Southwest offers 276 connecting flights per week. Southwest flies from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .
Frontier offers 21 connecting flights per week. Frontier flies from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .

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

The cheapest round-trip flight from Seattle to Washington, D.C. recently found on Google Flights was with Frontier from $165. The cheapest one-way flight was with United from $85.

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

The cheapest Delta flight from Seattle to Washington, D.C. is $197, flying from Feb 21 to Mar 2.
The cheapest Alaska flight from Seattle to Washington, D.C. is $199, flying from Feb 19 to Feb 25.
The cheapest United flight from Seattle to Washington, D.C. is $199, flying from Feb 26 to Mar 4.
The cheapest American flight from Seattle to Washington, D.C. is $179, flying from Feb 19 to Feb 25.
The cheapest Southwest flight from Seattle to Washington, D.C. is $179, flying from Feb 19 to Feb 25.
The cheapest Frontier flight from Seattle to Washington, D.C. is $165, flying from Feb 19 to Feb 28.

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

There are 14 Delta direct flights from Seattle to Washington, D.C. per week. Flights are available every day.
There are 28 Alaska direct flights from Seattle to Washington, D.C. per week. Flights are available every day.
There are 7 United direct flights from Seattle to Washington, D.C. 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 Seattle and Washington, D.C. at price $418 is offered by American from Sat, Jan 24 to Sun, Jan 25.

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

There are 14 Delta direct flights from Seattle to Washington, D.C. per week. Flights are available every day.
There are 28 Alaska direct flights from Seattle to Washington, D.C. per week. Flights are available every day.
There are 7 United direct flights from Seattle to Washington, D.C. 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 Seattle to Washington, D.C. on a daily basis.

The cheapest direct (nonstop) round-trip flights between Seattle and Washington, D.C. start at $199 from Thu, Feb 19 to Wed, Feb 25 with Alaska.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Seattle to Washington, D.C., 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 Seattle and Washington, D.C. start at $931 from Thu, Feb 19 to Sat, Feb 28 with Delta.

The cheapest economy class round-trip flights between Seattle and Washington, D.C. start at $165 from Thu, Feb 19 to Sat, Feb 28.

To book business class trips from Seattle to Washington, D.C., 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 Seattle and Washington, D.C. starts at $418 from Sat, Jan 24 to Sun, Jan 25 with American.

The cheapest last-minute deal between Seattle and Washington, D.C. at price $418 is offered by American from Sat, Jan 24 to Sun, Jan 25.

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