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

Return flights

22 Apr - 29 Apr	Aer Lingus
02 Apr - 06 Apr	Air Canada
02 Apr - 06 Apr	Virgin Atlantic	direct
01 Apr - 15 Apr	United
16 Apr - 19 Apr	Aer Lingus
10 Apr - 24 Apr	Aer Lingus
18 Apr - 25 Apr	Lufthansa
22 Apr - 29 Apr	Virgin Atlantic	direct
03 Apr - 10 Apr	Virgin Atlantic
15 Apr - 04 May	Virgin Atlantic
16 Apr - 05 May	Air France
02 Apr - 09 Apr	British Airways	direct
15 Apr - 04 May	British Airways	direct
16 Apr - 05 May	British Airways	direct

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

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 April from 406€

Return flights