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

Return flights

09 Sep - 25 Sep	Icelandair
17 Sep - 24 Sep	Spirit Airlines
04 Sep - 18 Sep	Icelandair
09 Sep - 23 Sep	Icelandair
08 Sep - 27 Sep	Icelandair
09 Sep - 27 Sep	Icelandair
04 Sep - 27 Sep	Icelandair
09 Sep - 16 Sep	Icelandair
25 Sep - 07 Oct	Spirit Airlines
27 Sep - 07 Oct	Icelandair
30 Sep - 21 Oct	jetBlue
10 Sep - 07 Oct	Spirit Airlines
23 Sep - 07 Oct	Spirit Airlines
10 Sep - 17 Sep	Spirit Airlines
08 Sep - 15 Sep	Spirit Airlines
24 Sep - 08 Oct	Spirit Airlines
25 Sep - 08 Oct	Spirit Airlines
10 Sep - 02 Oct	Spirit Airlines
25 Sep - 03 Oct	Spirit Airlines
27 Sep - 21 Oct	Spirit Airlines

Also check the deals for one-way flights from Detroit 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 Detroit to Dublin in September from 338€

Return flights