Cheap flights from Dublin to Illinois from £241

The month of September is, on average, the cheapest month to fly to Illinois from Dublin, with most prices found around £354. If you aren’t able to travel to Illinois during the month of September, then flying in November is also cheap. Prices for this month can be found on momondo for an average of £356.

The cheapest day to depart on your flight to Illinois is on a Tuesday when prices can be found for as low as £541. This is often the case because there is less demand to fly during this day of the week. Flights from Dublin to Illinois on a Saturday will generally be more expensive and average around £633. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our data shows that the cheapest Dublin to Illinois flights are usually those with departure times in the afternoon. Our users have found flights to Illinois in the afternoon for as low as £501. At midday is when there is more demand to fly to Illinois, so prices are often more expensive at around £626 per ticket.

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 £481 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 £364 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.

JetBlue, TAP AIR PORTUGAL, and Delta are the most popular carriers operating from Dublin to Illinois

Aer Lingus, United Airlines and Finnair 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 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

13 flights are operational daily from Dublin to Illinois as of March 2026. The most popular departure time for this route is 10:00, with 69% of flights per day taking off at midday.

As of March 2026, there are 92 flights per week flying from Dublin to Illinois. The most common day of the week flights depart is Fri, with 15% of flights taking off on this day.