Cheap Flights from Seattle (SEA) to Washington (DCA) from HK$937~

View HK$937 flight on Wed, 17 Dec 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Ronald Reagan Washington National Airport (DCA)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Find Cheap Flights from Seattle (SEA) to Washington (DCA)

Prices were available within the past 7 days and start at HK$937 for one-way flights and HK$3,090 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, 17 Dec - Thu, 25 Dec
SEA
Seattle
DCA
Washington
HK$3,090 Return, found 23 hours ago
HK$3,090
Return
found 23 hours ago
Select Alaska Airlines flight, departing Wed, 17 Dec from Seattle to Washington, returning Thu, 25 Dec, priced at HK$3,090 found 23 hours ago
Delta
Thu, 18 Dec - Wed, 24 Dec
SEA
Seattle
DCA
Washington
HK$3,402 Return, found 23 hours ago
HK$3,402
Return
found 23 hours ago
Select Delta flight, departing Thu, 18 Dec from Seattle to Washington, returning Wed, 24 Dec, priced at HK$3,402 found 23 hours ago
Delta
Sun, 21 Dec - Wed, 24 Dec
SEA
Seattle
DCA
Washington
HK$3,950 Return, found 23 hours ago
HK$3,950
Return
found 23 hours ago
Select Delta flight, departing Sun, 21 Dec from Seattle to Washington, returning Wed, 24 Dec, priced at HK$3,950 found 23 hours ago
Delta
Wed, 17 Dec - Tue, 30 Dec
SEA
Seattle
DCA
Washington
HK$4,025 Return, found 23 hours ago
HK$4,025
Return
found 23 hours ago
Select Delta flight, departing Wed, 17 Dec from Seattle to Washington, returning Tue, 30 Dec, priced at HK$4,025 found 23 hours ago
American Airlines
Fri, 19 Dec - Thu, 25 Dec
SEA
Seattle
DCA
Washington
HK$4,101 Return, found 23 hours ago
HK$4,101
Return
found 23 hours ago
Select American Airlines flight, departing Fri, 19 Dec from Seattle to Washington, returning Thu, 25 Dec, priced at HK$4,101 found 23 hours ago
Delta
Mon, 22 Dec - Thu, 25 Dec
SEA
Seattle
DCA
Washington
HK$4,176 Return, found 23 hours ago
HK$4,176
Return
found 23 hours ago
Select Delta flight, departing Mon, 22 Dec from Seattle to Washington, returning Thu, 25 Dec, priced at HK$4,176 found 23 hours ago
Delta
Fri, 19 Dec - Wed, 24 Dec
SEA
Seattle
DCA
Washington
HK$4,487 Return, found 23 hours ago
HK$4,487
Return
found 23 hours ago
Select Delta flight, departing Fri, 19 Dec from Seattle to Washington, returning Wed, 24 Dec, priced at HK$4,487 found 23 hours ago
Delta
Tue, 23 Dec - Wed, 24 Dec
SEA
Seattle
DCA
Washington
HK$4,563 Return, found 23 hours ago
HK$4,563
Return
found 23 hours ago
Select Delta flight, departing Tue, 23 Dec from Seattle to Washington, returning Wed, 24 Dec, priced at HK$4,563 found 23 hours ago
Delta
Sun, 21 Dec - Tue, 30 Dec
SEA
Seattle
DCA
Washington
HK$4,639 Return, found 23 hours ago
HK$4,639
Return
found 23 hours ago
Select Delta flight, departing Sun, 21 Dec from Seattle to Washington, returning Tue, 30 Dec, priced at HK$4,639 found 23 hours ago
United
Wed, 17 Dec - Fri, 26 Dec
SEA
Seattle
DCA
Washington
HK$4,800 Return, found 23 hours ago
HK$4,800
Return
found 23 hours ago
Select United flight, departing Wed, 17 Dec from Seattle to Washington, returning Fri, 26 Dec, priced at HK$4,800 found 23 hours ago

Find the cheapest month to fly from Seattle (SEA) to Washington (DCA)

May is typically the cheapest month to fly

From HK$1,244 - HK$3,626 per traveller.

Alternative airports near Washington

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

Select flight to Washington Dulles Intl. IAD. Cheapest option available. Average driving time to city centre is 36 minutes. Flights from HK$3,057
IAD
Washington Dulles Intl.
Cheapest
Average driving time to city centre36 min
Flights from HK$3,057

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Ronald Reagan Washington National
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
HK$3,090
Distance
3715 km
Average flight time
8 hours 3 mins

Book with confidence

Flights from Seattle to Washington

Book cheap flights from Seattle (SEA) to Washington (DCA) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from Seattle (SEA) to Washington (DCA) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Seattle (SEA) to Washington (DCA) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Washington flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Washington and things to do in Washington for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Washington more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Washington is HK$937 now!

 

Flights from Seattle to Washington

Explore a world of travel with Expedia

*Available to Expedia members.