Cheapest return flights from Chicago to Dublin in September from 515€

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

Return flights

14 Sep - 23 Sep KLM
01 Sep - 10 Sep Air France
08 Sep - 17 Sep Air France
01 Sep - 09 Sep Air France
08 Sep - 18 Sep Delta
09 Sep - 16 Sep Delta
21 Sep - 26 Sep Porter Airlines (Canada) Ltd
14 Sep - 19 Sep Frontier Airlines
08 Sep - 15 Sep Air France
27 Sep - 04 Oct Porter Airlines (Canada) Ltd
30 Sep - 16 Oct KLM
08 Sep - 14 Sep Porter Airlines (Canada) Ltd
26 Sep - 07 Oct Porter Airlines (Canada) Ltd
30 Sep - 06 Oct Air France
25 Sep - 03 Oct Frontier Airlines

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

Skyscanner

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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