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

Return flights

03 Sep - 31 Oct	Air Canada
02 Sep - 09 Sep	United
09 Sep - 16 Sep	United
08 Sep - 15 Sep	jetBlue
11 Sep - 18 Sep	United
04 Sep - 09 Sep	United
30 Sep - 07 Oct	United
17 Sep - 24 Sep	United
01 Sep - 08 Sep	United
07 Sep - 14 Sep	United
18 Sep - 22 Sep	Spirit Airlines
21 Sep - 28 Sep	Spirit Airlines
24 Sep - 01 Oct	Aer Lingus

Also check the deals for one-way flights from Nashville 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 Nashville to Dublin in September from 436€

Return flights