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

Return flights

13 Apr - 21 Apr	SWISS
21 Apr - 28 Apr	Lufthansa
28 Apr - 05 May	Lufthansa
14 Apr - 22 Apr	Lufthansa
17 Apr - 21 Apr	Lufthansa
11 Apr - 15 Apr	SWISS
19 Apr - 26 Apr	KLM
24 Apr - 01 May	Virgin Atlantic
03 Apr - 08 Apr	SWISS
20 Apr - 24 Apr	KLM
01 Apr - 08 Apr	Aer Lingus

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 $610

Return flights