AirHint found the following cheapest return flights from Pittsburgh (PIT) to Dublin (DUB) in September 2025 (see full year).

Return flights

04 Sep - 25 Sep	jetBlue
03 Sep - 10 Sep	jetBlue
25 Sep - 30 Sep	Spirit Airlines
09 Sep - 16 Sep	United
25 Sep - 28 Sep	Spirit Airlines
18 Sep - 22 Sep	Spirit Airlines
26 Sep - 01 Oct	Frontier Airlines
17 Sep - 22 Sep	Spirit Airlines
26 Sep - 30 Sep	Icelandair
26 Sep - 03 Oct	Icelandair
26 Sep - 28 Sep	Air Canada
26 Sep - 29 Sep	Air Canada

Also check the deals for one-way flights from Pittsburgh to Dublin in September.

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 Pittsburgh to Dublin in September from 427€

Return flights