Cheapest return flights from Seattle to London in July from $479

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

Return flights

29 Jul - 28 Aug Aer Lingus
29 Jul - 28 Aug British Airways direct
27 Jul - 05 Aug Delta
30 Jul - 05 Aug Delta
27 Jul - 05 Aug British Airways direct
25 Jul - 13 Aug Aer Lingus
30 Jul - 08 Aug British Airways
25 Jul - 05 Aug Delta
24 Jul - 05 Aug Delta
25 Jul - 13 Aug Air France direct
22 Jul - 29 Jul jetBlue
20 Jul - 31 Jul Air Canada
23 Jul - 31 Jul Air Canada
18 Jul - 29 Jul jetBlue
22 Jul - 29 Jul American Airlines direct
20 Jul - 31 Jul Air France direct
23 Jul - 31 Jul Air France direct
20 Jul - 25 Jul Scandinavian Airlines
18 Jul - 28 Jul jetBlue
18 Jul - 20 Jul Hawaiian Airlines

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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