Flights from Washington DC to Seattle Tacoma

Our cheapest offers for flights from Washington DC to Seattle Tacoma

Here you can compare cheap flights from Washington DC (DCA) to Seattle Tacoma (SEA) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Seattle Tacoma. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Best option
Washington DC
Seattle-Tacoma
Outbound
03/02/25
direct
AS0003
06h 10min
Return
03/07/25
direct
AS0002
04h 54min
Alaska Airlines ?
$344
Washington DC
Seattle-Tacoma
Outbound
03/02/25
direct
AS0003
06h 10min
Return
03/07/25
direct
AS0004
05h 07min
Alaska Airlines ?
$350
Washington DC
Seattle-Tacoma
Outbound
03/02/25
direct
AS0003
06h 10min
Return
03/07/25
direct
AS0004
05h 07min
Alaska Airlines ?
$359
Washington DC
Seattle-Tacoma
Outbound
03/02/25
direct
AS0003
06h 10min
Return
03/07/25
direct
AS0004
05h 07min
Alaska Airlines
$364
Washington DC
Seattle-Tacoma
Outbound
03/02/25
1 Stopover (PHL)
AA5248, AA2001
08h 06min
Return
03/07/25
1 Stopover (PHL)
AA2760, AA4608
09h 00min
American Airlines ?
$444
Washington DC
Seattle-Tacoma
Outbound
03/02/25
1 Stopover (ORD)
UA1793, UA1705
08h 19min
Return
03/07/25
1 Stopover (ORD)
UA0747, UA1705
08h 55min
United Airlines ?
$446
Washington DC
Seattle-Tacoma
Outbound
06/20/25
2 Stopovers (DEN, MSP)
F90687, SY0652, SY0285
31h 32min
Return
07/19/25
1 Stopover (DEN)
F91176, F90686
15h 52min
Frontier Airlines, Sun Country Airlines ?
$562
found 2 days ago
Washington DC
Seattle-Tacoma
Outbound
06/20/25
1 Stopover (LAX)
AS0005, AS1215
16h 21min
Return
07/19/25
direct
AS0002
05h 10min
Alaska Airlines ?
$620
found 2 days ago
Washington DC
Seattle-Tacoma
Outbound
03/02/25
1 Stopover (DEN)
F90689, F91175
16h 38min
Return
03/07/25
1 Stopover (DEN)
F93406, F90690
09h 22min
Frontier Airlines
$653
Washington DC
Seattle-Tacoma
Outbound
03/02/25
1 Stopover (DEN)
F90689, F91175
16h 38min
Return
03/07/25
1 Stopover (DEN)
F93406, F90690
09h 22min
Frontier Airlines
$655
Prices based on recent searches, subject to last-minute changes
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Important flight information

Flight information: Washington DC - Seattle-Tacoma

Roundtrip from $ 343,71
Flight duration min. 06:15
Return flight duration min. 04:55/ max. 08:20
Distance 3743 km
Flights per week 16
Departure airport Airport Washington DC - Ronald Reagan National Airport, VA (DCA)
Arrival airport Airport Seattle-Tacoma International Airport, WA (SEA)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Seattle-Tacoma
Flight destinations with a similar price
Flight destinations with a similar price