Cheapest return flights from Seattle to London in June from $830

AirHint found the following cheapest return flights from Seattle (SEA) to London (LTN) in June 2026 (see full year).

Return flights

01 Jun - 07 Jun Icelandair
03 Jun - 14 Jun WestJet
01 Jun - 22 Jun Icelandair
13 Jun - 21 Jun WestJet
15 Jun - 23 Jun SWISS
10 Jun - 23 Jun Lufthansa
10 Jun - 21 Jun Aer Lingus
22 Jun - 01 Jul SWISS
25 Jun - 23 Jul WestJet
27 Jun - 05 Jul Icelandair
26 Jun - 05 Jul Icelandair
15 Jun - 25 Jun SWISS
27 Jun - 11 Jul WestJet
16 Jun - 25 Jun WestJet
18 Jun - 09 Jul Icelandair
12 Jun - 26 Jun Condor
27 Jun - 02 Jul Icelandair

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

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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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