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

Return flights

16 Jan - 23 Jan	TAP
12 Jan - 17 Jan	SWISS
08 Jan - 15 Jan	SWISS
14 Jan - 02 Feb	SWISS
15 Jan - 18 Jan	TAP
22 Jan - 30 Jan	SWISS
20 Jan - 27 Jan	SWISS
14 Jan - 18 Jan	SWISS
12 Jan - 16 Jan	SWISS
29 Jan - 01 Feb	SWISS
30 Jan - 01 Feb	SWISS
23 Jan - 27 Jan	Scandinavian Airlines
19 Jan - 26 Jan	Lufthansa
31 Jan - 04 Feb	Lufthansa
25 Jan - 01 Feb	Lufthansa
14 Jan - 02 Feb	British Airways	direct
31 Jan - 04 Feb	British Airways	direct
25 Jan - 01 Feb	British Airways	direct
29 Jan - 01 Feb	British Airways	direct
04 Jan - 28 Feb	British Airways	direct

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 $455

Return flights