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

Return flights

07 May - 11 May	Icelandair
14 May - 26 May	Scandinavian Airlines
01 May - 06 May	KLM
05 May - 10 May	KLM
08 May - 10 May	KLM
08 May - 11 May	KLM
26 May - 02 Jun	Delta
29 May - 02 Jun	KLM
17 May - 24 May	Delta
01 May - 09 May	Scandinavian Airlines
22 May - 25 May	Scandinavian Airlines
20 May - 27 May	Delta
26 May - 28 Jun	Delta
27 May - 28 Jun	KLM
28 May - 28 Jun	KLM
27 May - 01 Jun	Delta
28 May - 01 Jun	KLM
29 May - 07 Jun	KLM
29 May - 01 Jun	KLM
27 May - 03 Jun	Delta

Also check the deals for one-way flights from Dublin 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 Dublin to Boston in May from $449

Return flights