Cheapest return flights from Boston to London in May from 539€

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

Return flights

04 May - 20 May Air France
26 May - 31 May Air Canada
06 May - 25 May Frontier Airlines
11 May - 18 May Scandinavian Airlines
04 May - 13 May Icelandair
06 May - 15 May Icelandair
11 May - 25 May KLM
18 May - 26 May Scandinavian Airlines
08 May - 12 May Icelandair
11 May - 22 May KLM
22 May - 03 Jun Porter Airlines (Canada) Ltd
25 May - 16 Jun Porter Airlines (Canada) Ltd
10 May - 02 Jun TAP
27 May - 17 Jun Porter Airlines (Canada) Ltd
31 May - 30 Jun Porter Airlines (Canada) Ltd
18 May - 01 Jun jetBlue
20 May - 05 Jun Porter Airlines (Canada) Ltd
24 May - 04 Jun Porter Airlines (Canada) Ltd
29 May - 02 Jun Porter Airlines (Canada) Ltd
31 May - 04 Jun Icelandair

Also check the deals for one-way flights from Boston 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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