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

Return flights

14 Apr - 30 Apr	Icelandair
29 Apr - 11 May	Icelandair
29 Apr - 10 May	Icelandair
23 Apr - 01 May	Icelandair
30 Apr - 11 May	Icelandair
13 Apr - 22 Apr	Icelandair
23 Apr - 10 May	Icelandair
25 Apr - 30 Apr	Icelandair
14 Apr - 18 Apr	Icelandair
23 Apr - 30 Apr	Icelandair
14 Apr - 20 Apr	Icelandair
13 Apr - 30 Apr	Icelandair
24 Apr - 01 May	Icelandair
01 Apr - 15 Apr	TAP
01 Apr - 08 Apr	TAP
08 Apr - 15 Apr	TAP
26 Apr - 02 May	Aer Lingus
22 Apr - 05 May	LEVEL
29 Apr - 19 May	LEVEL

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 332€

Return flights