Cheapest return flights from Washington to London in May from $440

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

Return flights

15 May - 24 May TAP
03 May - 23 May TAP
13 May - 20 May TAP
10 May - 17 May TAP
08 May - 25 May TAP
12 May - 19 May TAP
20 May - 02 Jun TAP
13 May - 10 Jun TAP
01 May - 29 May TAP
13 May - 06 Jun TAP
05 May - 30 May TAP
14 May - 06 Jun TAP
15 May - 06 Jun TAP
02 May - 12 May TAP
01 May - 08 May Icelandair
13 May - 10 Jun British Airways direct
16 May - 06 Jun Icelandair
13 May - 06 Jun British Airways direct
18 May - 13 Jun Air Canada
20 May - 02 Jun British Airways direct

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

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