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

Return flights

27 Oct - 04 Nov	Lufthansa
27 Oct - 04 Nov	Aer Lingus	direct
26 Oct - 04 Nov	Air Canada
26 Oct - 04 Nov	Aer Lingus	direct
28 Oct - 04 Nov	Aer Lingus	direct
25 Oct - 04 Nov	Lufthansa
27 Oct - 03 Nov	Lufthansa
24 Oct - 04 Nov	Lufthansa
27 Oct - 03 Nov	Aer Lingus	direct
29 Oct - 02 Nov	Aer Lingus	direct
24 Oct - 28 Oct	Turkish Airlines
26 Oct - 27 Oct	Lufthansa
24 Oct - 28 Oct	United	direct
26 Oct - 27 Oct	Aer Lingus	direct

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 $445

Return flights