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

Return flights

29 Apr - 13 May	SWISS
16 Apr - 20 Apr	SWISS
17 Apr - 21 Apr	Austrian Airlines
20 Apr - 04 May	Air Canada
29 Apr - 13 May	British Airways	direct
20 Apr - 04 May	Air France	direct
08 Apr - 15 Apr	Lufthansa
17 Apr - 21 Apr	Air France	direct
02 Apr - 09 Apr	TAP
04 Apr - 17 Apr	Air Canada
08 Apr - 15 Apr	Air France	direct
03 Apr - 06 Apr	TAP
01 Apr - 30 Apr	TAP
08 Apr - 11 Apr	Delta

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 $467

Return flights