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

Return flights

03 May - 13 May	Icelandair
02 May - 09 May	Icelandair
05 May - 12 May	Icelandair
02 May - 13 May	Icelandair
04 May - 13 May	Icelandair
13 May - 30 May	Icelandair
11 May - 30 May	Icelandair
13 May - 27 May	Icelandair
20 May - 28 May	Icelandair
20 May - 30 May	Icelandair
18 May - 16 Jun	Icelandair
20 May - 03 Jun	Icelandair
27 May - 14 Jun	TAP
01 May - 26 Jun	Icelandair
27 May - 03 Jun	Icelandair
25 May - 05 Jun	Icelandair
26 May - 09 Jun	Icelandair
29 May - 12 Jun	Icelandair
20 May - 05 Jun	Icelandair
31 May - 14 Jun	TAP

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

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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Cheapest return flights from Boston to London in May from 344€

Return flights