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

Return flights

02 Mar - 11 Mar	Icelandair
09 Mar - 23 Mar	Lufthansa
08 Mar - 16 Mar	Lufthansa
02 Mar - 09 Mar	Lufthansa
05 Mar - 09 Mar	Icelandair
11 Mar - 19 Mar	Air Canada
25 Mar - 01 Apr	Lufthansa
04 Mar - 08 Mar	Icelandair
09 Mar - 19 Mar	Lufthansa
02 Mar - 13 Mar	Lufthansa
06 Mar - 09 Mar	Lufthansa
30 Mar - 07 Apr	Lufthansa
30 Mar - 06 Apr	Lufthansa
25 Mar - 01 Apr	Aer Lingus	direct
30 Mar - 12 Apr	Lufthansa
27 Mar - 06 Apr	Turkish Airlines
30 Mar - 06 Apr	Aer Lingus	direct
27 Mar - 06 Apr	Aer Lingus	direct
28 Mar - 04 Apr	Alaska Airlines
26 Mar - 02 Apr	Aer Lingus

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

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 March from $471

Return flights