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

Return flights

21 Jan - 26 Jan	Aer Lingus
19 Jan - 21 Jan	Frontier Airlines
18 Jan - 26 Jan	Aer Lingus
09 Jan - 12 Jan	Aer Lingus
19 Jan - 22 Jan	Aer Lingus
23 Jan - 29 Jan	Spirit Airlines
13 Jan - 20 Jan	Air Canada
19 Jan - 23 Jan	Frontier Airlines
15 Jan - 21 Jan	Aer Lingus
18 Jan - 27 Jan	LEVEL
25 Jan - 01 Feb	Aer Lingus
27 Jan - 03 Feb	Air Canada
24 Jan - 01 Feb	TAP
29 Jan - 02 Feb	LEVEL
25 Jan - 02 Feb	jetBlue
19 Jan - 02 Feb	Spirit Airlines
30 Jan - 02 Feb	Icelandair
18 Jan - 03 Feb	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 $385

Return flights