Cheap flights from Illinois to Dublin from $285

In general, January is the cheapest month to fly from Illinois to Dublin. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $517. If you’re not able to fly to Dublin in January, then February is your next best option. Flight prices from Illinois to Dublin during February average around $518.

The cheapest day to depart from Illinois to Dublin is on a Monday. Travelers who choose to depart for Dublin on a Monday will often find tickets for as low as $785. Flights from Illinois to Dublin on a Friday will generally be more expensive and average around $893. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the evening is the cheapest time of day to fly from Illinois to Dublin when you can find flight prices for as low as $798. Flying to Dublin in the evening is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive with an average ticket price of $875.

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 $701 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dublin from Illinois for as low as $675 on momondo.

There are 4 cabin classes available to choose from on Illinois to Dublin flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

British Airways and United Airlines are the most popular carriers operating from Illinois to Dublin

Aer Lingus, United Airlines and American Airlines are the top three most popular airlines that fly to Dublin from Illinois according to our data. Aer Lingus is the first choice among our users, with 64% of people opting to fly with this airline when traveling to Dublin. Keep in mind that there are 13 different airlines that fly to Dublin on a routine basis, so you have a few additional options to choose from.

As of October 2026, 13 flights take off from Illinois and land in Dublin each day. The most common flight departure time for this route is 8:00PM, with 71% of daily flights taking off in the evening.

As of October 2026, 93 flights take off from Illinois and land in Dublin each week. The most common flight departure day for this route is Wed, with 15% of weekly flights taking off on this day.