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

Return flights

19 May - 24 May	Icelandair
18 May - 25 May	jetBlue
14 May - 21 May	jetBlue
29 May - 05 Jun	Air Canada
22 May - 27 May	Air Canada
21 May - 26 May	Air Canada
26 May - 05 Jun	Icelandair
14 May - 06 Jun	jetBlue
22 May - 30 May	Air Canada
29 May - 06 Jun	Air Canada
23 May - 30 May	Air Canada
27 May - 07 Jun	Icelandair
28 May - 04 Jun	jetBlue

Also check the deals for one-way flights from Washington 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 Washington to Dublin in May from $697

Return flights