Cheapest return flights from Boston to London in May from 400€

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

Return flights

02 May - 09 May Air Canada
08 May - 15 May Aer Lingus
07 May - 16 May Aer Lingus
02 May - 16 May Aer Lingus
12 May - 19 May British Airways direct
08 May - 15 May British Airways direct
14 May - 21 May Aer Lingus
03 May - 23 May Aer Lingus
07 May - 16 May British Airways direct
02 May - 09 May British Airways direct
19 May - 02 Jun Icelandair
19 May - 02 Jun British Airways direct
20 May - 13 Jun British Airways direct
22 May - 05 Jun Icelandair
22 May - 05 Jun British Airways direct
28 May - 20 Jun British Airways direct
23 May - 13 Jun British Airways direct
25 May - 20 Jun Finnair direct

Also check the deals for one-way flights from Boston to London in May.

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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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