Cheap flights from Dublin to Illinois from $288

The cheapest month to fly to Illinois from Dublin is in November. Flight prices, which tend to average around $473, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of November, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $509.

The cheapest day to depart from Dublin to Illinois is on a Sunday when prices can be found for as low as $680. Flights from Dublin to Illinois on a Thursday will generally be more expensive and average around $853. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Dublin to Illinois during this time can be as low as $768. Flights at noon are often more expensive with an average ticket price of $860.

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

You are more likely to see cheaper flights to Illinois from Dublin when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $633 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Dublin for as low as $539 on momondo.

There are 3 cabin classes available to choose from on Dublin to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

As of February 2026, there are 8 flights per day flying from Dublin to Illinois. The most common time of day flights depart is 10:00AM, with 59% of flights taking off at noon.

The number of flights available between Dublin and Illinois is 59 per week as of February 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.