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

Return flights

27 Jan - 02 Feb	SWISS
21 Jan - 04 Feb	SWISS
22 Jan - 29 Jan	SWISS
21 Jan - 26 Jan	Iberia
21 Jan - 28 Jan	Iberia
28 Jan - 04 Feb	Iberia
21 Jan - 03 Feb	Iberia
28 Jan - 02 Feb	Iberia
22 Jan - 26 Jan	Iberia
23 Jan - 26 Jan	Iberia
21 Jan - 25 Jan	Iberia
29 Jan - 05 Feb	Iberia
30 Jan - 04 Feb	Iberia
28 Jan - 01 Feb	Iberia
29 Jan - 02 Feb	Iberia
30 Jan - 03 Feb	Iberia
23 Jan - 25 Jan	Iberia
27 Jan - 30 Jan	Delta
16 Jan - 18 Jan	Delta
16 Jan - 19 Jan	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 $482

Return flights