Cheap flights from Dublin to Illinois from €358

The cheapest month to fly to Illinois from Dublin is in November. Flight prices, which tend to average around €425, are often lower during this time because this is during the off-season. If you’re not able to fly to Illinois in November, then September is your next best option. Flight prices from Dublin to Illinois during September average around €501.

According to our data, Thursday is the cheapest day to fly to Illinois from Dublin. The lowest ticket price found for a Thursday departure recently was €639. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from Dublin because it is more convenient for both business and leisure travellers. As a result, prices tend to be around €778.

According to our data, the cheapest time of day to fly to Illinois is in the afternoon. momondo users have found flights departing from Dublin to Illinois in the afternoon for as low as €624. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the morning because they tend to be around €708. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 €580 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Dublin for as low as €454 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.

WestJet is the most popular carrier operating from Dublin to Illinois

Aer Lingus, Finnair and United Airlines are the top three most popular airlines that fly to Illinois from Dublin according to our data. Aer Lingus is the first choice among our users, with 68% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

As of September 2026, 17 flights take off from Dublin and land in Illinois each day. The most common flight departure time for this route is 11:00, with 80% of daily flights taking off at midday.

As of September 2026, 124 flights take off from Dublin and land in Illinois each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.