Cheapest return flights from Washington to London in May from $624

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

Return flights

06 May - 13 May Icelandair
08 May - 25 May Icelandair
20 May - 26 May Icelandair
21 May - 27 May Icelandair
06 May - 13 May British Airways direct
06 May - 30 May TAP
05 May - 30 May TAP
21 May - 28 May Scandinavian Airlines
14 May - 06 Jun TAP
20 May - 26 May British Airways direct
25 May - 31 May Scandinavian Airlines
14 May - 06 Jun British Airways direct

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

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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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