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

Return flights

15 Jan - 22 Jan	TAP
22 Jan - 31 Jan	TAP
16 Jan - 21 Jan	TAP
17 Jan - 07 Feb	TAP
15 Jan - 07 Feb	TAP
16 Jan - 07 Feb	TAP
18 Jan - 07 Feb	TAP
12 Jan - 19 Jan	Lufthansa
17 Jan - 28 Jan	Air Canada
08 Jan - 22 Jan	Air Canada
11 Jan - 31 Jan	Iberia For Level
17 Jan - 21 Jan	Iberia For Level
09 Jan - 18 Jan	Iberia
08 Jan - 12 Jan	Iberia For Level
12 Jan - 07 Feb	United
23 Jan - 10 Feb	United
13 Jan - 07 Feb	United
31 Jan - 21 Feb	Air France
20 Jan - 14 Feb	Air France
19 Jan - 14 Feb	Air France

Also check the deals for one-way flights from Boston to London 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 Boston to London in January from 377€

Return flights