Cheapest return flights from London to Boston in June from $499

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 June 2025 (see full year).

Return flights

23 Jun - 16 Jul TAP
06 Jun - 08 Jun Icelandair
20 Jun - 09 Jul Austrian Airlines
03 Jun - 25 Jun Austrian Airlines
26 Jun - 16 Jul SWISS
24 Jun - 04 Jul SWISS
11 Jun - 13 Jul SWISS
15 Jun - 02 Jul SWISS
18 Jun - 09 Jul Icelandair
04 Jun - 25 Jun Icelandair
05 Jun - 25 Jun Icelandair
02 Jun - 25 Jun SWISS
10 Jun - 02 Jul Icelandair
09 Jun - 16 Jun Icelandair
30 Jun - 10 Jul Icelandair
14 Jun - 28 Jun SWISS
08 Jun - 22 Jun SWISS
02 Jun - 16 Jun SWISS
05 Jun - 09 Jun SWISS
17 Jun - 05 Jul SWISS

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

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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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