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

Return flights

28 Jan - 04 Feb	SWISS
14 Jan - 21 Jan	SWISS
12 Jan - 19 Jan	SWISS
15 Jan - 29 Jan	SWISS
22 Jan - 27 Jan	SWISS
12 Jan - 17 Jan	SWISS
23 Jan - 29 Jan	SWISS
07 Jan - 17 Jan	SWISS
15 Jan - 18 Jan	SWISS
21 Jan - 25 Jan	SWISS
22 Jan - 25 Jan	SWISS
29 Jan - 01 Feb	SWISS
31 Jan - 07 Feb	SWISS
23 Jan - 05 Feb	Delta

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

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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Cheapest return flights from London to Boston in January from $537

Return flights