Cheapest return flights from Seattle to London in July from $795

Best time to book flights for Seattle (SEA) to London (LHR) flights at AirHint

AirHint found the following cheapest return flights from Seattle (SEA) to London (LHR) in July 2025 (see full year).

Return flights

22 Jul - 28 Jul Icelandair
14 Jul - 20 Jul Icelandair
20 Jul - 28 Jul Icelandair
09 Jul - 16 Jul Icelandair
04 Jul - 30 Jul Icelandair
04 Jul - 18 Jul Aer Lingus
08 Jul - 29 Jul Aer Lingus
23 Jul - 13 Aug Icelandair
02 Jul - 16 Jul Aer Lingus
02 Jul - 10 Jul Aer Lingus
08 Jul - 15 Jul United
31 Jul - 17 Aug Icelandair
31 Jul - 05 Aug Icelandair
28 Jul - 04 Aug United
31 Jul - 05 Aug Air France direct
31 Jul - 17 Aug British Airways direct
23 Jul - 13 Aug British Airways direct

Also check the deals for one-way flights from Seattle to London in July.

Skyscanner

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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