Cheapest return flights from Washington to London in May from 598€

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

Return flights

05 May - 12 May Icelandair
05 May - 13 May TAP
04 May - 14 May Icelandair
10 May - 20 May TAP
13 May - 21 May Icelandair
01 May - 12 May Icelandair
04 May - 16 May Icelandair
19 May - 26 May Porter Airlines (Canada) Ltd
26 May - 23 Jun Porter Airlines (Canada) Ltd
01 May - 08 May Icelandair
04 May - 27 May Icelandair
23 May - 05 Jun Frontier Airlines
05 May - 04 Jun Icelandair
26 May - 09 Jun Air Canada
25 May - 01 Jun Air Canada
19 May - 20 Jun Porter Airlines (Canada) Ltd
27 May - 10 Jun Porter Airlines (Canada) Ltd
28 May - 11 Jun Porter Airlines (Canada) Ltd
27 May - 07 Jun Scandinavian Airlines
23 May - 17 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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