AirHint found the following cheapest return flights from Washington (DCA) to Dublin (DUB) in October 2025 (see full year).

Return flights

22 Oct - 29 Oct	United
08 Oct - 15 Oct	Air Canada
27 Oct - 03 Nov	United
09 Oct - 13 Oct	jetBlue
30 Oct - 04 Nov	Air Canada
24 Oct - 31 Oct	Air Canada
17 Oct - 24 Oct	United
17 Oct - 20 Oct	jetBlue
22 Oct - 26 Oct	Air Canada
07 Oct - 13 Oct	jetBlue
17 Oct - 26 Oct	Air Canada
06 Oct - 10 Oct	jetBlue
31 Oct - 04 Nov	TAP
30 Oct - 03 Nov	TAP

Also check the deals for one-way flights from Washington to Dublin in October.

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 October from $506

Return flights