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

Return flights

12 Apr - 24 Apr	Air Canada
13 Apr - 09 May	Icelandair
16 Apr - 09 May	Icelandair
22 Apr - 29 Apr	Aer Lingus	direct
12 Apr - 24 Apr	Aer Lingus	direct
13 Apr - 09 May	Aer Lingus	direct
16 Apr - 09 May	Aer Lingus	direct

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

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 April from $413

Return flights