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

Return flights

09 Apr - 14 Apr	Scandinavian Airlines
10 Apr - 13 Apr	Scandinavian Airlines
16 Apr - 21 Apr	Lufthansa
16 Apr - 19 Apr	Lufthansa
22 Apr - 27 Apr	Lufthansa
06 Apr - 13 Apr	Scandinavian Airlines
17 Apr - 28 Apr	Austrian Airlines
18 Apr - 21 Apr	Austrian Airlines
14 Apr - 18 Apr	Lufthansa
17 Apr - 22 Apr	Air Canada
27 Apr - 12 May	Air Canada
30 Apr - 08 May	United
27 Apr - 12 May	British Airways	direct
30 Apr - 08 May	British Airways	direct

Also check the deals for one-way flights from London to Boston 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 London to Boston in April from $472

Return flights