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

Return flights

14 Jan - 18 Jan	Scandinavian Airlines
12 Jan - 18 Jan	Scandinavian Airlines
14 Jan - 22 Jan	Scandinavian Airlines
29 Jan - 05 Feb	Scandinavian Airlines
15 Jan - 18 Jan	Scandinavian Airlines
10 Jan - 12 Jan	Scandinavian Airlines
20 Jan - 17 Feb	Scandinavian Airlines
08 Jan - 15 Jan	SWISS
15 Jan - 19 Jan	TAP
14 Jan - 17 Jan	Air Canada
14 Jan - 21 Jan	Air Canada
08 Jan - 13 Jan	SWISS
29 Jan - 05 Feb	British Airways	direct
20 Jan - 17 Feb	American Airlines	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 367€

Return flights