£112 Cheap Alaska Airlines flights from Seattle to Washington (SEA→DCA)

View £112 flight on Thu, 4 Jun 2026Opens in a new window

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Alaska Airlines flights from Seattle to Washington (SEA→DCA)

Prices were available within the past 7 days and start at £112 for one-way flights and £247 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 6 Jun - Tue, 9 Jun
SEA
Seattle
DCA
Washington
£247 Return, found 2 days ago
£247
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 6 Jun from Seattle to Washington, returning Tue, 9 Jun, priced at £247 found 2 days ago
Alaska Airlines
Thu, 27 Aug - Sat, 5 Sept
SEA
Seattle
DCA
Washington
£263 Return, found 6 days ago
£263
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 27 Aug from Seattle to Washington, returning Sat, 5 Sept, priced at £263 found 6 days ago
Alaska Airlines
Thu, 27 Aug - Sat, 5 Sept
SEA
Seattle
DCA
Washington
£270 Return, found 6 days ago
£270
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 27 Aug from Seattle to Washington, returning Sat, 5 Sept, priced at £270 found 6 days ago
Alaska Airlines
Thu, 4 Jun - Wed, 10 Jun
SEA
Seattle
DCA
Washington
£284 Return, found 4 days ago
£284
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 4 Jun from Seattle to Washington, returning Wed, 10 Jun, priced at £284 found 4 days ago
Alaska Airlines
Thu, 4 Jun - Wed, 10 Jun
SEA
Seattle
DCA
Washington
£285 Return, found 6 days ago
£285
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 4 Jun from Seattle to Washington, returning Wed, 10 Jun, priced at £285 found 6 days ago
Alaska Airlines
Thu, 27 Aug - Sat, 5 Sept
SEA
Seattle
DCA
Washington
£303 Return, found 6 days ago
£303
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 27 Aug from Seattle to Washington, returning Sat, 5 Sept, priced at £303 found 6 days ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Average driving time to city centre is 40 minutes. Flights from £440
BWI
Baltimore Washington Intl. Thurgood Marshall
Average driving time to city centre40 min
Flights from £440
Select flight to Washington Dulles Intl. IAD. Cheapest option available. Average driving time to city centre is 36 minutes. Flights from £411
IAD
Washington Dulles Intl.
Cheapest
Average driving time to city centre36 min
Flights from £411

Frequently asked questions

How much is an Alaska Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
You can find affordable return Alaska Airlines flights from £247 from SEA to DCA by sorting your results from "Price (lowest to highest)" on Expedia. Or look for options from £112 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from SEA to DCA with Alaska Airlines?
January is one of the most affordable months to get away to Washington with Alaska Airlines. You could also find great prices on one-way and round-trip tickets in February.
Does Alaska Airlines fly nonstop from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Take off on one of Alaska Airlines's 14 weekly direct flights from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA). To view available options, enter your dates, destination and origin and hit search. Then select the "Nonstop" and "Airline" filters.
How long does it take to fly from SEA to DCA with Alaska Airlines?
It takes approximately 4h 59m to travel nonstop from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA) with Alaska Airlines.
Which day of the week has the most Alaska Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Alaska Airlines operates the most flights from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA) on Thursday. With up to 2 daily departures, you'll get the most options and flexibility on this day.
What airports does Alaska Airlines fly into in Washington?
When jetting off from Seattle - Tacoma Intl. Airport (SEA) to Washington with Alaska Airlines, you're most likely to touch down at Ronald Reagan Washington National Airport (DCA). This is the airline's main hub in this destination. Other nearby airports like Washington Dulles Intl. Airport (IAD) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI) may have lower airfares, so it's a good idea to explore all available options on Expedia.
What type of plane does Alaska Airlines fly from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Book an Alaska Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA), and you'll probably be on a Boeing 737-800. Keep in mind though, that the aircraft type can vary depending on operational reasons.
Can I change or cancel my Alaska Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Ronald Reagan Washington National Airport (DCA)?
Changes are generally free within 24 hours of making your booking, but your airline may charge a fee after that time. For further details about altering your reservation, head to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to change your plans without additional charges, apply the "Changes included" and "No cancel fee" filters when organising your trip.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Ronald Reagan Washington National
Airlines serving
Alaska Airlines
Popular airline
Alaska Airlines
Distance
3715 km
Average flight time
8 hours 18 mins

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