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

Return flights

11 Jun - 18 Jun	Air Canada
11 Jun - 18 Jun	British Airways	direct
15 Jun - 30 Jun	SWISS
15 Jun - 30 Jun	British Airways	direct
02 Jun - 27 Jun	British Airways	direct
24 Jun - 01 Jul	Finnair	direct
08 Jun - 04 Jul	British Airways	direct
21 Jun - 05 Jul	Finnair	direct
16 Jun - 23 Jun	British Airways	direct
21 Jun - 04 Jul	British Airways	direct
24 Jun - 15 Jul	SWISS
24 Jun - 15 Jul	British Airways	direct
18 Jun - 29 Jun	Delta	direct

Also check the deals for one-way flights from Boston to London 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 Boston to London in June from 462€

Return flights