Cheapest return flights from Boston to London in May from $488

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

Return flights

01 May - 09 May Air Canada
06 May - 18 May Air Canada
09 May - 16 May Air Canada
19 May - 26 May Icelandair
06 May - 18 May Air France direct
01 May - 09 May Air France direct
09 May - 16 May Air France direct
11 May - 16 May British Airways direct
06 May - 06 May Iberia
03 May - 03 May Iberia

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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