Flights from Seattle to London

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From $722 · Prices update daily

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Price calendar — next 60 days

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Jul 5Jul 14Jul 25Aug 11Aug 14Aug 25Sep 16Oct 11

★ Cheapest: $722 on Sun, Oct 11 · AS

Lowest return fares · Prices update daily · Final price confirmed at booking

Airlines flying Seattle to London

DLDelta Air Lines

Approximately $574 – $1,130 economy; Delta One business at a premium

Direct · about 9h 25m eastbound / 9h 45m westbound

ASAlaska Airlines

Approximately $620 – $1,180 economy; new 787-9 business suites at a premium

Direct · about 9h 25m eastbound / 9h 45m westbound

BABritish Airways

Approximately $600 – $1,160 economy; Club Suite business at a premium

Direct · about 9h 25m eastbound / 9h 45m westbound

VSVirgin Atlantic

Approximately $610 – $1,170 economy; Upper Class at a premium

Direct · about 9h 25m eastbound / 9h 45m westbound

Visa for London

🟢 Visa-free for US passport holders

No visa; UK ETA required (£20, since Feb 25 2026) for US passports

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Travel insurance

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Planning a trip to London?Hotels from $18/nt|Tours from $16

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