Cheapest return flights from London to Boston in May from $450

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

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

Return flights

14 May - 19 May SWISS
14 May - 21 May SWISS
05 May - 14 May SWISS
13 May - 21 May SWISS
05 May - 13 May SWISS
05 May - 12 May SWISS
05 May - 08 May Austrian Airlines
06 May - 22 May SWISS
14 May - 22 May SWISS
12 May - 18 May SWISS
30 May - 15 Jun Icelandair
22 May - 03 Jun Icelandair
25 May - 08 Jun Icelandair
26 May - 01 Jun Icelandair
27 May - 01 Jun Icelandair
26 May - 05 Jun Icelandair
12 May - 16 Jun Icelandair
28 May - 19 Jun Icelandair
30 May - 03 Jun Icelandair
23 May - 01 Jun Icelandair

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

Skyscanner

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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