Cheapest return flights from London to Boston in August from $688

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

Return flights

31 Aug - 09 Sep SWISS
05 Aug - 19 Aug Delta
17 Aug - 31 Aug Delta
08 Aug - 15 Aug Virgin Atlantic
24 Aug - 01 Sep Lufthansa
11 Aug - 26 Aug British Airways
11 Aug - 27 Aug British Airways
19 Aug - 26 Aug British Airways
27 Aug - 01 Sep Lufthansa
15 Aug - 29 Aug Virgin Atlantic
05 Aug - 18 Aug SWISS
20 Aug - 27 Aug Lufthansa
04 Aug - 18 Aug Lufthansa

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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