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

Return flights

06 Apr - 08 Apr	Iberia
12 Apr - 14 Apr	Delta
22 Apr - 29 Apr	Air Canada
05 Apr - 12 Apr	Air Canada
23 Apr - 27 Apr	Air Canada
23 Apr - 28 Apr	Air Canada
25 Apr - 02 May	Air Canada
08 Apr - 14 Apr	Air Canada
13 Apr - 20 Apr	Aer Lingus
21 Apr - 30 Apr	Aer Lingus
29 Apr - 04 May	Aer Lingus
30 Apr - 07 May	Iberia
19 Apr - 27 Apr	Aer Lingus
23 Apr - 01 May	Aer Lingus
25 Apr - 02 May	jetBlue	direct
29 Apr - 04 May	Finnair	direct
23 Apr - 01 May	Air France	direct
30 Apr - 07 May	British Airways	direct
28 Apr - 05 May	Icelandair

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 323€

Return flights