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

Return flights

29 Oct - 07 Nov	Aer Lingus	direct
26 Oct - 05 Nov	Aer Lingus	direct
29 Oct - 12 Nov	Aer Lingus	direct
29 Oct - 05 Nov	Aer Lingus	direct
20 Oct - 03 Nov	Lufthansa
28 Oct - 05 Nov	Air Canada
28 Oct - 07 Nov	Air Canada
31 Oct - 09 Nov	Icelandair
18 Oct - 01 Nov	Icelandair
19 Oct - 02 Nov	Icelandair
21 Oct - 29 Oct	Air Canada
14 Oct - 22 Oct	Air Canada
14 Oct - 24 Oct	Air Canada
22 Oct - 29 Oct	Air Canada
15 Oct - 29 Oct	Air Canada
14 Oct - 21 Oct	Air Canada
13 Oct - 23 Oct	Air Canada
20 Oct - 28 Oct	Lufthansa
20 Oct - 30 Oct	Lufthansa
15 Oct - 22 Oct	Icelandair

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 $333

Return flights