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

Return flights

06 May - 10 May	Ryanair
19 May - 24 May	Ryanair
08 May - 18 May	Ryanair
12 May - 19 May	Ryanair
13 May - 20 May	Ryanair
07 May - 11 May	Ryanair
11 May - 20 May	Ryanair
15 May - 22 May	Ryanair
11 May - 31 May	Ryanair
04 May - 09 May	Ryanair
29 May - 07 Jun	Ryanair
13 May - 14 Jun	Ryanair
13 May - 15 Jun	Ryanair
16 May - 01 Jun	Ryanair
28 May - 01 Jun	Ryanair
29 May - 05 Jun	Ryanair
23 May - 05 Jun	Ryanair
31 May - 21 Jun	Ryanair
31 May - 17 Jun	Ryanair

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

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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Cheapest return flights from London to Boston in May from 450€

Return flights