Cheapest return flights from London to Boston in May from 391€

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

Return flights

04 May - 11 May SWISS
09 May - 16 May SWISS
05 May - 19 May SWISS
06 May - 13 May Lufthansa
02 May - 09 May Lufthansa
01 May - 08 May Austrian Airlines
02 May - 16 May Austrian Airlines
15 May - 22 May Lufthansa
01 May - 06 May Austrian Airlines
13 May - 20 May SWISS
22 May - 02 Jun Lufthansa
30 May - 06 Jun Austrian Airlines
26 May - 02 Jun Lufthansa
18 May - 01 Jun Lufthansa
23 May - 05 Jun Lufthansa
26 May - 02 Jun Virgin Atlantic direct
18 May - 01 Jun British Airways direct
22 May - 02 Jun Finnair direct
23 May - 05 Jun British Airways direct
30 May - 06 Jun British Airways direct

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