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

Return flights

13 Jan - 18 Jan	Icelandair
20 Jan - 31 Jan	Icelandair
11 Jan - 22 Jan	Icelandair
12 Jan - 23 Jan	Icelandair
24 Jan - 28 Jan	Icelandair
16 Jan - 19 Jan	Icelandair
17 Jan - 31 Jan	Icelandair
21 Jan - 30 Jan	Icelandair
22 Jan - 27 Jan	Icelandair
14 Jan - 21 Jan	Icelandair
31 Jan - 10 Feb	Icelandair
26 Jan - 16 Feb	Icelandair
25 Jan - 01 Feb	Icelandair
27 Jan - 25 Feb	Icelandair
30 Jan - 02 Feb	Icelandair
30 Jan - 07 Feb	Icelandair
30 Jan - 08 Feb	Icelandair
12 Jan - 26 Feb	Icelandair
30 Jan - 06 Feb	Icelandair
30 Jan - 01 Feb	Icelandair

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 327€

Return flights