AirHint found the following cheapest return flights from London (LHR) to Boston (BOS) in October 2025 (see full year).

Return flights

20 Oct - 25 Oct	TAP
23 Oct - 03 Nov	TAP
20 Oct - 26 Oct	TAP
23 Oct - 02 Nov	TAP
29 Oct - 08 Nov	Scandinavian Airlines
29 Oct - 09 Nov	Scandinavian Airlines
09 Oct - 20 Oct	SWISS
07 Oct - 20 Oct	SWISS
09 Oct - 21 Oct	SWISS
01 Oct - 13 Oct	SWISS
08 Oct - 20 Oct	SWISS
07 Oct - 14 Oct	SWISS
28 Oct - 04 Nov	SWISS
08 Oct - 16 Oct	SWISS
23 Oct - 30 Oct	TAP
20 Oct - 03 Nov	TAP
21 Oct - 02 Nov	TAP
31 Oct - 07 Nov	TAP
24 Oct - 03 Nov	Air France	direct
31 Oct - 03 Nov	TAP

Also check the deals for one-way flights from London to Boston in October.

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 October from 363€

Return flights