Cheapest return flights from Washington to London in May from $607

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

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

Return flights

05 May - 12 May Aer Lingus
06 May - 13 May Icelandair
05 May - 13 May Icelandair
07 May - 14 May TAP
08 May - 21 May TAP
08 May - 14 May TAP
27 May - 04 Jun Air Canada
13 May - 17 Jun Icelandair
11 May - 21 May TAP
29 May - 03 Jun Scandinavian Airlines
25 May - 29 May Frontier Airlines
14 May - 21 May SWISS
03 May - 11 May Icelandair
14 May - 18 Jun Icelandair
27 May - 03 Jun Air Canada
31 May - 07 Jun Air Canada
30 May - 08 Jun Porter Airlines (Canada) Ltd
27 May - 07 Jun Air Canada
30 May - 15 Jun Porter Airlines (Canada) Ltd
30 May - 02 Jun Porter Airlines (Canada) Ltd

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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