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

Return flights

04 Jun - 14 Jun	SWISS
04 Jun - 24 Jun	SWISS
09 Jun - 15 Jun	SWISS
05 Jun - 14 Jun	SWISS
09 Jun - 21 Jun	SWISS
04 Jun - 08 Jun	SWISS
08 Jun - 22 Jun	SWISS
04 Jun - 07 Jun	SWISS
03 Jun - 10 Jun	SWISS
06 Jun - 13 Jun	SWISS
30 Jun - 14 Jul	Lufthansa
30 Jun - 20 Jul	Lufthansa
29 Jun - 03 Jul	Lufthansa
30 Jun - 17 Jul	Lufthansa
15 Jun - 07 Jul	Lufthansa
14 Jun - 07 Jul	Lufthansa
29 Jun - 08 Jul	Lufthansa
15 Jun - 06 Jul	Lufthansa
30 Jun - 21 Jul	Lufthansa
24 Jun - 05 Jul	Air Canada

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

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 June from 445€

Return flights