Cheapest one-way flights from Chicago to Dublin in September from $276

AirHint found the following cheapest one-way flights from Chicago (ORD) to Dublin (DUB) in September 2025 (see full year).

One-Way flights

30 Sep WestJet
27 Sep Frontier Airlines
26 Sep Spirit Airlines
25 Sep Frontier Airlines
22 Sep TAP
21 Sep ITA Airways
20 Sep Frontier Airlines
30 Sep Aer Lingus direct
19 Sep Frontier Airlines
23 Sep Spirit Airlines

Also check the deals for return 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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