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

Return flights

07 Oct - 14 Oct	Aer Lingus
07 Oct - 07 Oct	Aer Lingus
06 Oct - 16 Oct	Aer Lingus
16 Oct - 20 Oct	Scandinavian Airlines
06 Oct - 11 Oct	Scandinavian Airlines
17 Oct - 19 Oct	Scandinavian Airlines
28 Oct - 03 Nov	Aer Lingus
01 Oct - 07 Oct	Lufthansa
27 Oct - 06 Nov	SWISS
09 Oct - 12 Oct	United
09 Oct - 19 Oct	United
01 Oct - 15 Oct	SWISS
07 Oct - 14 Nov	SWISS
29 Oct - 03 Nov	SWISS
30 Oct - 13 Nov	Scandinavian Airlines
30 Oct - 04 Nov	SWISS
30 Oct - 03 Nov	SWISS
20 Oct - 03 Nov	TAP
30 Oct - 09 Nov	Scandinavian Airlines
30 Oct - 02 Nov	Air Canada

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 $434

Return flights