Flights Washington → Seattle

One way · Economy · 1 adult · price per person · next 14 days from September 10, 2026

Last observed price on Aviasales for 3 of 15 dates; the lowest is $210. Prices are not guaranteed and are confirmed at booking time.

Last observed price by date

Date	Last observed price	Flight	Departure	Arrival	Stops
Thu, Sep 10	—	—	—	—	—
Fri, Sep 11	—	—	—	—	—
Sat, Sep 12	—	—	—	—	—
Sun, Sep 13	—	—	—	—	—
Mon, Sep 14	—	—	—	—	—
Tue, Sep 15	$210lowest	Frontier Airlines F9685 (1st of 2 flights)	7:00 AM Reagan National (DCA)	3:08 PM Sea-Tac (SEA)	1 stop · Denver International
Wed, Sep 16	—	—	—	—	—
Thu, Sep 17	—	—	—	—	—
Fri, Sep 18	—	—	—	—	—
Sat, Sep 19	—	—	—	—	—
Sun, Sep 20	$227	Frontier Airlines F94277 (1st of 2 flights)	6:00 AM Dulles (IAD)	9:42 AM (+1) Sea-Tac (SEA)	1 stop · Las Vegas Harry Reid
Mon, Sep 21	$221	Alaska Airlines AS737	5:57 PM Dulles (IAD)	8:44 PM Sea-Tac (SEA)	Direct
Tue, Sep 22	—	—	—	—	—
Wed, Sep 23	—	—	—	—	—
Thu, Sep 24	—	—	—	—	—

Price not guaranteed: it is confirmed on Aviasales at booking time. How it works

Washington, United States (WAS, city code)

Washington Dulles (IAD), Washington Reagan National (DCA).

Seattle, United States (SEA, city code)

Seattle-Tacoma (SEA).

FromToDeparture date