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

Return flights

24 Sep - 29 Sep	Spirit Airlines
25 Sep - 18 Oct	Spirit Airlines
25 Sep - 28 Sep	Spirit Airlines
23 Sep - 03 Oct	United
21 Sep - 28 Sep	Spirit Airlines
18 Sep - 22 Sep	Spirit Airlines
20 Sep - 11 Oct	Spirit Airlines
18 Sep - 21 Sep	Allegiant Air

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 656€

Return flights