Cheap flights from Illinois to Dublin from €163

If you aren’t able to travel during the month of February, then book flights to Dublin from Illinois during January instead. Flights to Dublin in January, while not as cheap as those in February, still average around €293.

Our data shows that Thursday is the least expensive day to fly to Dublin. Tickets to fly out on this day can be as low as €552. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around €919. These prices are subject to change though, so be sure to set up a Price Alert for flights to Dublin.

Our data shows that the cheapest Illinois to Dublin flights are usually those with departure times in the afternoon. Our users have found flights to Dublin in the afternoon for as low as €669. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are €852 on average. Flights to Dublin from Illinois in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Chicago O'Hare Intl to Dublin for the best Illinois - Dublin flight prices

You are more likely to see cheaper flights to Dublin from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around €580 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dublin from Illinois for as low as €553 on momondo.

The number of flights available between Illinois and Dublin is 20 per day as of May 2026. The most frequent departure time is 20:00, with 80% of daily flights leaving in the evening.

140 flights are operational weekly from Illinois to Dublin as of May 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.