Flights London → 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 $461. 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	$613	Ryanair FR341 (1st of 3 flights)	9:25 PM Luton (LTN)	6:45 PM (+1) Sea-Tac (SEA)	2 stops · Dublin, Calgary
Sun, Sep 13	—	—	—	—	—
Mon, Sep 14	—	—	—	—	—
Tue, Sep 15	—	—	—	—	—
Wed, Sep 16	—	—	—	—	—
Thu, Sep 17	—	—	—	—	—
Fri, Sep 18	—	—	—	—	—
Sat, Sep 19	$461lowest	American Airlines AA729 (1st of 2 flights)	9:15 AM Heathrow (LHR)	10:57 PM Sea-Tac (SEA)	1 stop · Philadelphia International
Sun, Sep 20	—	—	—	—	—
Mon, Sep 21	—	—	—	—	—
Tue, Sep 22	$550	Ryanair FR113 (1st of 3 flights)	8:50 AM Gatwick (LGW)	6:45 PM Sea-Tac (SEA)	2 stops · Dublin, Calgary
Wed, Sep 23	—	—	—	—	—
Thu, Sep 24	—	—	—	—	—

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

London, United Kingdom (LON, city code)

London Heathrow (LHR), London City (LCY), London Gatwick (LGW), London Luton (LTN), London Southend (SEN), London Stansted (STN).

Seattle, United States (SEA, city code)

Seattle-Tacoma (SEA).

FromToDeparture date