Cheapest return flights from Boston to London in May from 419€

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

Return flights

13 May - 20 May Air Canada
12 May - 16 May Aer Lingus
05 May - 13 May Iberia
07 May - 10 May Aer Lingus
12 May - 26 May Air Canada
19 May - 26 May Icelandair
13 May - 27 May Iberia
13 May - 20 May Finnair direct
18 May - 22 May Aer Lingus
12 May - 26 May Virgin Atlantic direct
18 May - 16 Jun Iberia
18 May - 16 Jun British Airways direct
28 May - 04 Jun Air Canada
25 May - 01 Jun Iberia
27 May - 03 Jun Iberia
25 May - 01 Jun Finnair direct
28 May - 04 Jun Finnair direct
27 May - 03 Jun British Airways direct
28 May - 28 Jun Air Canada
28 May - 28 Jun British Airways 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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