Cheapest return flights from Washington to London in May from $493

Best time to book flights for Washington (IAD) to London (LHR) flights at AirHint

AirHint found the following cheapest return flights from Washington (IAD) to London (LHR) in May 2025 (see full year).

Return flights

05 May - 13 May Scandinavian Airlines
05 May - 12 May Scandinavian Airlines
06 May - 13 May Scandinavian Airlines
05 May - 16 May Scandinavian Airlines
06 May - 12 May Scandinavian Airlines
08 May - 14 May Scandinavian Airlines
01 May - 16 May Icelandair
02 May - 18 May Icelandair
01 May - 15 May Icelandair
01 May - 09 May Icelandair
19 May - 04 Jun Scandinavian Airlines
11 May - 03 Jun Icelandair
11 May - 02 Jun Icelandair
11 May - 03 Jun Iberia direct
14 May - 02 Jun Icelandair
14 May - 18 Jun Icelandair
18 May - 01 Jun Scandinavian Airlines
17 May - 15 Jun Scandinavian Airlines
31 May - 08 Jun Icelandair
29 May - 12 Jun Icelandair

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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