Cheapest return flights from London to Boston in May from $506

Best time to book flights for London (LCY) to Boston (BOS) flights at AirHint

AirHint found the following cheapest return flights from London (LCY) to Boston (BOS) in May 2025 (see full year).

Return flights

27 May - 01 Jun SWISS
27 May - 09 Jun SWISS
27 May - 06 Jun SWISS
30 May - 05 Jun SWISS
26 May - 05 Jun Lufthansa
26 May - 06 Jun SWISS
29 May - 07 Jun SWISS
29 May - 05 Jun SWISS
28 May - 01 Jun SWISS
29 May - 01 Jun SWISS
21 May - 27 May SWISS
21 May - 29 May SWISS
22 May - 25 May SWISS
17 May - 25 May SWISS
23 May - 27 May SWISS
17 May - 27 May SWISS
19 May - 29 May SWISS
20 May - 27 May SWISS
22 May - 27 May SWISS
21 May - 25 May SWISS

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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