Cheapest return flights from Washington to London in May from $524

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

Return flights

13 May - 20 May Icelandair
06 May - 11 May Icelandair
04 May - 14 May Icelandair
06 May - 14 May Icelandair
11 May - 20 May Icelandair
08 May - 20 May Icelandair
10 May - 20 May Icelandair
05 May - 12 May Icelandair
06 May - 12 May Icelandair
10 May - 14 May Icelandair
08 May - 03 Jun Icelandair
20 May - 03 Jun Icelandair
17 May - 13 Jun Icelandair
17 May - 01 Jun Icelandair
18 May - 02 Jun Icelandair
14 May - 09 Jun Icelandair
14 May - 01 Jun Icelandair
19 May - 03 Jun Icelandair
19 May - 02 Jun Icelandair
27 May - 05 Jun Icelandair

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

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