Cheapest return flights from Boston to London in May from $472

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

Return flights

01 May - 04 May Iberia
13 May - 20 May Iberia
05 May - 30 May Iberia
06 May - 12 May Aer Lingus
07 May - 10 May British Airways direct
02 May - 09 May Iberia direct
01 May - 10 May British Airways direct
06 May - 12 May Iberia direct
17 May - 29 May Icelandair
21 May - 26 May Icelandair
28 May - 11 Jun Iberia
28 May - 20 Jun British Airways direct
28 May - 08 Jun Aer Lingus
25 May - 01 Jun Iberia direct
28 May - 08 Jun American Airlines direct
30 May - 02 Jun British Airways direct
31 May - 07 Jun British Airways direct
26 May - 02 Jun British Airways direct
28 May - 04 Jun British Airways direct
29 May - 05 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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