Cheapest return flights from Seattle to London in May from 533€

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

Return flights

06 May - 15 May Icelandair
06 May - 13 May Air Canada
06 May - 15 May Air France direct
20 May - 31 May Icelandair
22 May - 29 May Scandinavian Airlines
24 May - 29 May Scandinavian Airlines
20 May - 31 May KLM direct
22 May - 29 May KLM direct
06 May - 13 May British Airways direct
24 May - 29 May British Airways direct

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

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.

Book a cheap hotel in London

Cheap car rent in London

Feel free to contact us with any feedback or request another flight research.