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

Return flights

22 Jan - 29 Jan	TAP
25 Jan - 01 Feb	Air Canada
29 Jan - 03 Feb	jetBlue	direct
15 Jan - 19 Jan	Aer Lingus
20 Jan - 29 Jan	Aer Lingus
08 Jan - 15 Jan	jetBlue
22 Jan - 29 Jan	Virgin Atlantic	direct
08 Jan - 15 Jan	jetBlue	direct
02 Jan - 09 Jan	British Airways	direct
25 Jan - 01 Feb	American Airlines	direct
15 Jan - 19 Jan	British Airways	direct
20 Jan - 29 Jan	British Airways	direct
03 Jan - 07 Jan	Icelandair

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 363€

Return flights