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
04/03/26
1 Stopover (ORD)
UA3483, UA1801
08h 00min
Return
04/16/26
1 Stopover (IAH)
UA2135, UA0625
09h 04min
United Airlines ?
$421
Washington DC
Seattle-Tacoma
Outbound
04/03/26
1 Stopover (EWR)
UA4408, UA1289
08h 15min
Return
04/16/26
1 Stopover (IAH)
UA2135, UA2079
11h 19min
United Airlines ?
$448
Washington DC
Seattle-Tacoma
Outbound
04/03/26
1 Stopover (SAN)
AS0015, AS0622
11h 49min
Return
04/16/26
1 Stopover (LAX)
AS0797, AS0006
11h 26min
Alaska Airlines ?
$546
Washington DC
Seattle-Tacoma
Outbound
04/03/26
1 Stopover (ORD)
AA1818, AA3142
08h 14min
Return
04/16/26
1 Stopover (DFW)
AA0717, AA2554
07h 54min
American Airlines ?
$613
Washington DC
Seattle-Tacoma
Outbound
04/03/26
1 Stopover (ORD)
UA3483, AS0409
10h 34min
Return
04/16/26
2 Stopovers (DUB, JFK)
EI0052, EI0107, EI2587
25h 12min
United Airlines, Alaska Airlines ?
$1,551
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 $420.20
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