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

Return flights

01 Apr - 08 Apr	TAP
22 Apr - 28 Apr	Aer Lingus
21 Apr - 30 Apr	Aer Lingus
25 Apr - 30 Apr	Aer Lingus
29 Apr - 03 May	Aer Lingus
25 Apr - 10 May	Aer Lingus
21 Apr - 27 Apr	Aer Lingus
08 Apr - 19 Apr	Aer Lingus
01 Apr - 05 Apr	TAP
08 Apr - 12 Apr	Icelandair
19 Apr - 27 Apr	Icelandair
24 Apr - 03 May	Icelandair
30 Apr - 11 May	Icelandair
09 Apr - 13 Apr	Icelandair
28 Apr - 05 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 $452

Return flights