LHR to SEA from $713 in economy – flightdeals.net

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Air France

Delta Air Lines

DLDelta Air Lines

KLM

Round Trip•Economy

London Heathrow Airport

London Heathrow, United Kingdom

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$824 USD

-13%$713 USD

Verified 16 days ago

September 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

31$866 1$866 2$866 3$740 4$738 5$738 6$738 7$740 8$740 9$737 10$740 11$738 12$745 13$756 14$740 15$759 16$728 17$732 18$739 19$731 20$728 21$728 22$728 23$727 24$727 25$728 26$735 27$725 28$717 29$717 30$724 1$717 2$728 3$728 4$717

Great Availability

60% of dates checked are available within 10% of the lowest price

Monday, September 21st, 2026

4 round-trip options

Returning

Sat, Sep 26, 2026•5 Day Trip

$829 USD

Returning

Tue, Sep 29, 2026•8 Day Trip

$731 USD

Returning

Wed, Sep 30, 2026•9 Day Trip

$731 USD

Returning

Sat, Oct 3, 2026•12 Day Trip

$728 USD