Cheapest return flights from London to Boston in August from $473

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 August 2025 (see full year).

Return flights

30 Aug - 17 Sep SWISS
21 Aug - 10 Sep Scandinavian Airlines
29 Aug - 17 Sep SWISS
26 Aug - 17 Sep SWISS
22 Aug - 10 Sep Scandinavian Airlines
24 Aug - 10 Sep Icelandair
23 Aug - 10 Sep Icelandair
18 Aug - 26 Aug Scandinavian Airlines
28 Aug - 04 Sep Scandinavian Airlines
29 Aug - 15 Sep Scandinavian Airlines
28 Aug - 11 Sep Scandinavian Airlines
20 Aug - 25 Aug Scandinavian Airlines
19 Aug - 31 Aug Scandinavian Airlines
21 Aug - 26 Aug Scandinavian Airlines
20 Aug - 27 Aug Scandinavian Airlines
25 Aug - 31 Aug Scandinavian Airlines
21 Aug - 28 Aug Scandinavian Airlines
22 Aug - 31 Aug Scandinavian Airlines
20 Aug - 30 Aug Scandinavian Airlines
20 Aug - 29 Aug Scandinavian Airlines

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

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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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