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

Return flights

16 Apr - 09 May	Icelandair
09 Apr - 16 Apr	Icelandair
14 Apr - 21 Apr	Icelandair
24 Apr - 01 May	Icelandair
25 Apr - 16 May	Icelandair
28 Apr - 23 May	Icelandair
14 Apr - 21 Apr	Aer Lingus	direct
29 Apr - 06 May	Aer Lingus	direct
05 Apr - 13 Apr	Air Canada
05 Apr - 13 Apr	Aer Lingus	direct
19 Apr - 26 Apr	Aer Lingus	direct
28 Apr - 23 May	Aer Lingus	direct
16 Apr - 09 May	Aer Lingus	direct
25 Apr - 16 May	Aer Lingus	direct
10 Apr - 18 Apr	Aer Lingus	direct
10 Apr - 19 Apr	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.

Book a cheap hotel in Dublin

Cheap car rent in Dublin

Cheapest return flights from Seattle to Dublin in April from $382

Return flights