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Cheapest one-way flights from Seattle (SEA) to London (LHR), July

Select a price to book. see full year.

Dates, airline, and price
Dates	Airline	Price
24 Jul	jetBlue
22 Jul	jetBlue
28 Jul	jetBlue
30 Jul	jetBlue
26 Jul	jetBlue
31 Jul	Icelandair
21 Jul	jetBlue
20 Jul	Icelandair
17 Jul	Alaska Airlines
28 Jul	Finnair Direct Flight

deals for return flights from Seattle to London in July.

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Updated Jul 16, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Seattle (SEA) to London (LHR), July

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