Flights Seattle → Boston

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

Last observed price on Aviasales for 7 of 15 dates; the lowest is $180. 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	$295	American Airlines AA2886 (1st of 2 flights)	10:45 PM Sea-Tac (SEA)	10:24 AM (+1) Logan (BOS)	1 stop · Philadelphia International
Sat, Sep 12	$615	Frontier Airlines F93406 (1st of 4 flights)	4:27 PM Sea-Tac (SEA)	6:09 AM (+3) Logan (BOS)	3 stops · Denver International, Los Angeles International, Portland
Sun, Sep 13	$180lowest	Alaska Airlines AS214	11:06 PM Sea-Tac (SEA)	7:39 AM (+1) Logan (BOS)	Direct
Mon, Sep 14	—	—	—	—	—
Tue, Sep 15	—	—	—	—	—
Wed, Sep 16	—	—	—	—	—
Thu, Sep 17	$262	United Airlines UA663 (1st of 4 flights)	2:34 PM Sea-Tac (SEA)	3:50 PM (+1) Logan (BOS)	3 stops · Denver International, Calgary, Ottawa
Fri, Sep 18	$289	Alaska Airlines AS460	3:29 PM Sea-Tac (SEA)	11:54 PM Logan (BOS)	Direct
Sat, Sep 19	$261	Alaska Airlines AS214	11:06 PM Sea-Tac (SEA)	7:39 AM (+1) Logan (BOS)	Direct
Sun, Sep 20	$283	JetBlue B6398	11:42 PM Sea-Tac (SEA)	8:06 AM (+1) Logan (BOS)	Direct
Mon, Sep 21	—	—	—	—	—
Tue, Sep 22	—	—	—	—	—
Wed, Sep 23	—	—	—	—	—
Thu, Sep 24	—	—	—	—	—

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

Seattle, United States (SEA, city code)

Seattle-Tacoma (SEA).

Boston, United States (BOS, city code)

Boston Logan (BOS).

FromToDeparture date