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

Return flights

20 Oct - 05 Nov	Aer Lingus	direct
26 Oct - 15 Nov	Air France
19 Oct - 08 Nov	Air France
25 Oct - 16 Nov	Delta
31 Oct - 17 Nov	Aer Lingus	direct
27 Oct - 22 Nov	KLM
25 Oct - 16 Nov	Aer Lingus	direct
24 Oct - 15 Nov	Air France
30 Oct - 03 Nov	Air France
18 Oct - 08 Nov	Air France
21 Oct - 28 Oct	Delta
22 Oct - 29 Oct	Aer Lingus	direct
20 Oct - 27 Oct	Air Canada
17 Oct - 23 Oct	Lufthansa
20 Oct - 27 Oct	Aer Lingus	direct
23 Oct - 27 Oct	Lufthansa
24 Oct - 27 Oct	Lufthansa
24 Oct - 28 Oct	United
25 Oct - 29 Oct	Aer Lingus	direct
24 Oct - 27 Oct	Aer Lingus	direct

Also check the deals for one-way flights from Seattle 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 Seattle to Dublin in October from 360€

Return flights