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

Return flights

05 Apr - 19 Apr	Icelandair
20 Apr - 27 Apr	Icelandair
14 Apr - 23 Apr	Icelandair
13 Apr - 20 Apr	Icelandair
18 Apr - 22 Apr	Icelandair
15 Apr - 19 Apr	Icelandair
17 Apr - 24 Apr	Icelandair
17 Apr - 20 Apr	Icelandair
17 Apr - 19 Apr	Icelandair
05 Apr - 12 Apr	Icelandair
28 Apr - 05 May	Icelandair
20 Apr - 04 May	Icelandair
21 Apr - 05 May	Icelandair
29 Apr - 05 May	Icelandair
27 Apr - 02 May	Icelandair
29 Apr - 06 May	Icelandair
19 Apr - 03 May	Icelandair
02 Apr - 02 May	Virgin Atlantic
24 Apr - 15 May	Icelandair
28 Apr - 04 May	SWISS

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 340€

Return flights