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

Return flights

11 May - 17 May	Scandinavian Airlines
11 May - 18 May	Scandinavian Airlines
01 May - 07 May	Scandinavian Airlines
02 May - 04 May	Scandinavian Airlines
21 May - 25 May	Scandinavian Airlines
20 May - 26 May	Scandinavian Airlines
24 May - 27 May	Icelandair
18 May - 25 May	Icelandair
05 May - 12 May	Icelandair
20 May - 29 May	Icelandair
26 May - 06 Jun	British Airways
26 May - 06 Jun	Aer Lingus	direct

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.

Book a cheap hotel in Boston

Cheap car rent in Boston

Cheapest return flights from Dublin to Boston in May from $440

Return flights