Cheapest one-way flights from Seattle to London in July from $351

AirHint found the following cheapest one-way flights from Seattle (SEA) to London (LHR) in July 2026 (see full year).

One-Way flights

19 Jul Icelandair
27 Jul Aer Lingus
29 Jul Austrian Airlines
27 Jul Alaska Airlines direct
26 Jul Lufthansa
07 Jul Finnair
29 Jul Alaska Airlines direct
15 Jul Icelandair
05 Jul Finnair
04 Jul Alaska Airlines

Also check the deals for return flights from Seattle to London in July.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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