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

Return flights

06 May - 13 May	Finnair
04 May - 11 May	Air Canada
03 May - 10 May	Icelandair
01 May - 08 May	Icelandair
13 May - 20 May	Finnair
07 May - 14 May	Air Canada
11 May - 18 May	Air Canada
10 May - 17 May	Air Canada
09 May - 16 May	Icelandair
12 May - 19 May	Icelandair
16 May - 06 Jun	British Airways
16 May - 06 Jun	Aer Lingus	direct

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

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 May from 354€

Return flights