Cheapest return flights from London to Boston in May from $595

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

Return flights

21 May - 25 May Ryanair
02 May - 10 May Ryanair
20 May - 27 May Ryanair
27 May - 03 Jun Ryanair
04 May - 10 May Ryanair
15 May - 24 May Ryanair
02 May - 09 May Ryanair
24 May - 31 May Ryanair
22 May - 26 May Ryanair
15 May - 22 May Ryanair
03 May - 09 May Ryanair
27 May - 04 Jun easyJet
13 May - 03 Jun Ryanair
31 May - 06 Jun Ryanair
31 May - 12 Jun Ryanair
08 May - 14 Jun Ryanair
26 May - 18 Jun Turkish Airlines
29 May - 04 Jun Ryanair

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