Cheapest return flights from Washington to London in May from $542

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

Return flights

01 May - 08 May Icelandair
12 May - 19 May Icelandair
06 May - 13 May Icelandair
11 May - 20 May Icelandair
10 May - 15 May Icelandair
10 May - 16 May Icelandair
01 May - 14 May Icelandair
13 May - 20 May Icelandair
02 May - 09 May Icelandair
08 May - 13 May Icelandair
18 May - 04 Jun Icelandair
21 May - 01 Jun Icelandair
29 May - 07 Jun Icelandair
30 May - 06 Jun Icelandair
22 May - 04 Jun Icelandair
22 May - 01 Jun Icelandair
30 May - 02 Jun Air Canada
29 May - 02 Jun Porter Airlines (Canada) Ltd
29 May - 12 Jun Icelandair

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

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