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

Return flights

04 May - 08 May	Air France	direct
08 May - 17 May	Air Canada
27 May - 10 Jun	Air Canada
20 May - 03 Jun	United
27 May - 10 Jun	Air France	direct
08 May - 17 May	Air France	direct
20 May - 03 Jun	Delta	direct

Also check the deals for one-way flights from Boston to Dublin 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 Boston to Dublin in May from 349€

Return flights