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
Washington DC
Seattle-Tacoma
Outbound
10/10/25
1 Stopover (DEN)
F90689, F93405
09h 31min
Return
11/04/25
1 Stopover (DEN)
F93406, F90688
08h 01min
Frontier Airlines ?
$241
Best option
Washington DC
Seattle-Tacoma
Outbound
10/18/25
direct
HA6703
05h 55min
Return
11/17/25
direct
AS0002
05h 10min
Hawaiian Airlines
$343
Washington DC
Seattle-Tacoma
Outbound
10/10/25
1 Stopover (DEN)
F90689, F93405
09h 31min
Return
11/04/25
direct
HA6704
05h 15min
Frontier Airlines
$247
Washington DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (DEN)
F90689, F93405
09h 31min
Return
11/12/25
1 Stopover (DEN)
F93406, F90686
27h 04min
Frontier Airlines
$254
Washington DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (PDX)
AS0009, AS2190
08h 14min
Return
11/12/25
direct
AS0002
05h 10min
Alaska Airlines ?
$257
Washington DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (DEN)
F90689, F93405
09h 31min
Return
11/12/25
1 Stopover (DEN)
F93406, F90686
27h 04min
Frontier Airlines
$265
Washington DC
Seattle-Tacoma
Outbound
07/08/25
1 Stopover (DEN)
F90685, F94545
19h 42min
Return
08/07/25
direct
AS0002
05h 01min
Frontier Airlines ?
$269
Washington DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (PDX)
AS0009, AS2190
08h 14min
Return
11/12/25
direct
AS0002
05h 10min
Alaska Airlines ?
$285
Washington DC
Seattle-Tacoma
Outbound
11/03/25
1 Stopover (PDX)
AS0009, AS2190
08h 14min
Return
11/12/25
direct
AS0002
05h 10min
Alaska Airlines ?
$292
Washington DC
Seattle-Tacoma
Outbound
10/18/25
1 Stopover (ORD)
AA1187, AA3029
08h 29min
Return
11/17/25
1 Stopover (ORD)
AA2442, AA2345
06h 30min
American Airlines ?
$321
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 $240.15
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