Flights from Seattle to London
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From $722 · Prices update daily
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Price calendar — next 60 days
★ Cheapest: $722 on Sun, Oct 11 · AS
Lowest return fares · Prices update daily · Final price confirmed at booking
Airlines flying Seattle to London
Approximately $574 – $1,130 economy; Delta One business at a premium
Direct · about 9h 25m eastbound / 9h 45m westbound
Approximately $620 – $1,180 economy; new 787-9 business suites at a premium
Direct · about 9h 25m eastbound / 9h 45m westbound
Approximately $600 – $1,160 economy; Club Suite business at a premium
Direct · about 9h 25m eastbound / 9h 45m westbound
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
Full London visa guide →Travel insurance
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