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

Return flights

03 Sep - 10 Sep	Aer Lingus	direct
15 Sep - 24 Sep	Aer Lingus	direct
08 Sep - 15 Sep	Aer Lingus	direct
02 Sep - 07 Oct	Air France
29 Sep - 06 Oct	Aer Lingus	direct
17 Sep - 24 Sep	Aer Lingus	direct
02 Sep - 09 Sep	United
05 Sep - 12 Sep	United
11 Sep - 18 Sep	United
25 Sep - 30 Sep	Spirit Airlines
14 Sep - 21 Sep	United
26 Sep - 03 Oct	Aer Lingus	direct
22 Sep - 01 Oct	Spirit Airlines
20 Sep - 27 Sep	United
22 Sep - 01 Oct	Aer Lingus	direct

Also check the deals for one-way flights from Indianapolis 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 Indianapolis to Dublin in September from 418€

Return flights