AirHint found the following cheapest return flights from Seattle (SEA) to Dublin (DUB) in February 2026 (see full year).

Return flights

18 Feb - 24 Feb	Lufthansa
16 Feb - 04 Mar	United
16 Feb - 04 Mar	Aer Lingus	direct
16 Feb - 11 Mar	Aer Lingus	direct
23 Feb - 04 Mar	Aer Lingus	direct
25 Feb - 04 Mar	Aer Lingus	direct
22 Feb - 02 Mar	KLM
18 Feb - 28 Feb	Lufthansa
18 Feb - 01 Mar	Lufthansa
19 Feb - 26 Feb	Lufthansa
20 Feb - 27 Feb	Lufthansa
20 Feb - 02 Mar	Air Canada
19 Feb - 01 Mar	SWISS
22 Feb - 01 Mar	Air Canada
20 Feb - 28 Feb	Lufthansa
15 Feb - 22 Feb	KLM
09 Feb - 16 Feb	Icelandair
14 Feb - 23 Feb	Air Canada
24 Feb - 27 Feb	Icelandair
18 Feb - 23 Feb	Lufthansa

Also check the deals for one-way flights from Seattle to Dublin in February.

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 February from $609

Return flights