Cheapest return flights from Boston to London in May from $473

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

Return flights

06 May - 13 May Iberia
05 May - 30 May Iberia
09 May - 30 May Iberia
06 May - 30 May Iberia
07 May - 10 May British Airways direct
07 May - 19 May British Airways direct
05 May - 12 May British Airways direct
09 May - 16 May Aer Lingus
14 May - 06 Jun Iberia
20 May - 13 Jun Iberia
20 May - 06 Jun Iberia
01 May - 23 May British Airways direct
09 May - 16 May Air France direct
18 May - 16 Jun British Airways direct
22 May - 13 Jun Iberia
20 May - 13 Jun British Airways direct
20 May - 06 Jun American Airlines direct
28 May - 20 Jun British Airways direct
26 May - 02 Jun Aer Lingus
27 May - 04 Jun Aer Lingus

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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