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

Return flights

12 Apr - 20 Apr	Air Canada
21 Apr - 28 Apr	Air Canada
23 Apr - 28 Apr	Icelandair
23 Apr - 27 Apr	Icelandair
24 Apr - 27 Apr	Icelandair
24 Apr - 30 Apr	Icelandair
29 Apr - 03 May	Icelandair
12 Apr - 29 Apr	SWISS
25 Apr - 05 May	Icelandair
20 Apr - 27 Apr	Air Canada
20 Apr - 26 Apr	Air Canada
02 Apr - 06 Apr	Icelandair
28 Apr - 12 May	Aer Lingus
26 Apr - 08 May	Icelandair
30 Apr - 04 May	Air Canada
24 Apr - 01 May	Air Canada
30 Apr - 10 May	Air Canada
23 Apr - 10 May	Icelandair
27 Apr - 01 May	Icelandair
22 Apr - 05 May	Turkish Airlines

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 $391

Return flights