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

Return flights

26 Oct - 04 Nov	KLM
27 Oct - 12 Nov	KLM
22 Oct - 01 Nov	Air Canada
27 Oct - 03 Nov	Air Canada
26 Oct - 03 Nov	KLM
24 Oct - 04 Nov	Air France
13 Oct - 08 Nov	Air France
20 Oct - 15 Nov	Air France
27 Oct - 22 Nov	Air France
16 Oct - 20 Oct	jetBlue
16 Oct - 21 Oct	jetBlue
10 Oct - 16 Oct	jetBlue
07 Oct - 11 Oct	jetBlue
22 Oct - 28 Oct	Delta
14 Oct - 24 Oct	jetBlue
15 Oct - 22 Oct	jetBlue
01 Oct - 14 Oct	jetBlue
06 Oct - 14 Oct	jetBlue
04 Oct - 15 Oct	jetBlue
16 Oct - 02 Nov	Delta

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 $443

Return flights