Cheapest return flights from London to Boston in May from 384€

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

Return flights

04 May - 20 May SWISS
01 May - 10 May Austrian Airlines
13 May - 20 May Lufthansa
09 May - 12 May Austrian Airlines
02 May - 06 May Austrian Airlines
09 May - 16 May Austrian Airlines
05 May - 12 May Finnair
08 May - 22 May SWISS
04 May - 11 May Lufthansa
03 May - 10 May Lufthansa
30 May - 06 Jun Austrian Airlines
29 May - 26 Jun Austrian Airlines
22 May - 07 Jun Lufthansa
29 May - 14 Jun Austrian Airlines
31 May - 06 Jun SWISS
25 May - 08 Jun SWISS
29 May - 11 Jun Austrian Airlines
28 May - 04 Jun SWISS
25 May - 08 Jun British Airways direct
29 May - 11 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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