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

Return flights

04 May - 06 May	Wizz Air UK
06 May - 13 May	Wizz Air UK
05 May - 13 May	Wizz Air UK
13 May - 18 May	Vueling Airlines
07 May - 12 May	Wizz Air UK
04 May - 13 May	easyJet
05 May - 11 May	Vueling Airlines
06 May - 11 May	Vueling Airlines
14 May - 18 May	Vueling Airlines
06 May - 12 May	LEVEL
10 May - 10 Jun	SWISS
13 May - 03 Jun	SWISS
15 May - 02 Jun	SWISS
28 May - 07 Jun	SWISS
26 May - 24 Jun	SWISS
30 May - 06 Jun	SWISS
28 May - 05 Jun	SWISS
18 May - 01 Jun	SWISS
29 May - 06 Jun	SWISS
27 May - 02 Jun	British Airways

Also check the deals for one-way flights from London to Boston 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 London to Boston in May from 289€

Return flights