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

Return flights

04 Jun - 10 Jun	Lufthansa
01 Jun - 10 Jun	Lufthansa
01 Jun - 08 Jun	Lufthansa
01 Jun - 17 Jun	Lufthansa
01 Jun - 15 Jun	Lufthansa
05 Jun - 07 Jun	Lufthansa
12 Jun - 16 Jun	SWISS
22 Jun - 30 Jun	SWISS
17 Jun - 01 Jul	SWISS
09 Jun - 16 Jun	Lufthansa
18 Jun - 23 Jun	Lufthansa
30 Jun - 14 Jul	Lufthansa
23 Jun - 07 Jul	Lufthansa
26 Jun - 12 Jul	SWISS

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 $647

Return flights