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

Return flights

16 Mar - 23 Mar	Icelandair
09 Mar - 16 Mar	Icelandair
12 Mar - 20 Mar	Icelandair
03 Mar - 10 Mar	Brussels Airlines
02 Mar - 09 Mar	British Airways
01 Mar - 09 Mar	British Airways
02 Mar - 10 Mar	British Airways
06 Mar - 14 Mar	British Airways
15 Mar - 22 Mar	Air Canada
01 Mar - 08 Mar	Delta
31 Mar - 07 Apr	United
31 Mar - 08 Apr	United
29 Mar - 05 Apr	Delta
30 Mar - 06 Apr	Delta
29 Mar - 06 Apr	Delta
30 Mar - 07 Apr	Delta
25 Mar - 01 Apr	Delta
27 Mar - 03 Apr	Delta
24 Mar - 01 Apr	Delta
25 Mar - 02 Apr	Delta

Also check the deals for one-way flights from Portland 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 Portland to Dublin in March from $403

Return flights