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

Return flights

01 Jun - 08 Jun	Air Canada
11 Jun - 18 Jun	Air Canada
08 Jun - 16 Jun	Air Canada
11 Jun - 18 Jun	Iberia	direct
04 Jun - 13 Jun	Iberia
08 Jun - 16 Jun	Finnair	direct
04 Jun - 13 Jun	Finnair	direct
01 Jun - 08 Jun	British Airways	direct
21 Jun - 28 Jun	Air Canada
08 Jun - 22 Jun	Air Canada
24 Jun - 08 Jul	Iberia
28 Jun - 06 Jul	Iberia
03 Jun - 01 Jul	British Airways	direct
24 Jun - 08 Jul	British Airways	direct
28 Jun - 06 Jul	British Airways	direct
28 Jun - 13 Jul	Air Canada
28 Jun - 13 Jul	Finnair	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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Boston to London in June from 514€

Return flights