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

Return flights

17 Jun - 05 Jul	SWISS
04 Jun - 10 Jun	SWISS
01 Jun - 01 Jul	Austrian Airlines
02 Jun - 16 Jun	Air Canada
01 Jun - 07 Jun	Air Canada
01 Jun - 17 Jun	Air Canada
01 Jun - 10 Jun	Air Canada
12 Jun - 18 Jun	SWISS
24 Jun - 01 Jul	Air Canada
23 Jun - 04 Jul	Air Canada
01 Jun - 14 Jun	Air Canada
19 Jun - 30 Jun	Air Canada
11 Jun - 02 Jul	SWISS
17 Jun - 01 Jul	Air Canada
18 Jun - 02 Jul	SWISS
30 Jun - 14 Jul	Air Canada
19 Jun - 05 Jul	Air Canada
29 Jun - 13 Jul	Air Canada
01 Jun - 08 Jun	Lufthansa
01 Jun - 12 Jun	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 $494

Return flights