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 - 05 Nov	Air France
21 Oct - 07 Nov	Air France
13 Oct - 08 Nov	Air France
27 Oct - 22 Nov	Air France
23 Oct - 07 Nov	Air France
24 Oct - 07 Nov	Air France
06 Oct - 01 Nov	Air Canada
23 Oct - 15 Nov	Air France
30 Oct - 03 Nov	KLM
24 Oct - 31 Oct	Air France
23 Oct - 30 Oct	Delta
10 Oct - 16 Oct	Delta
09 Oct - 17 Oct	Delta
03 Oct - 15 Oct	Air Canada
01 Oct - 13 Oct	Delta
01 Oct - 12 Oct	Delta
01 Oct - 11 Oct	Air France
06 Oct - 12 Oct	Delta
19 Oct - 26 Oct	Air Canada

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 377€

Return flights