Cheap flights from Chicago to Dublin from $275

In general, February is the cheapest month to fly from Chicago to Dublin. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $340. If you’re not able to fly to Dublin in February, then January is your next best option. Flight prices from Chicago to Dublin during January average around $344.

The cheapest day to depart from Chicago to Dublin is on a Monday. Travelers who choose to depart for Dublin on a Monday will often find tickets for as low as $722. Flights from Chicago to Dublin on a Saturday will generally be more expensive and average around $837. 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 Chicago to Dublin when you can find flight prices for as low as $743. 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 $806.

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

You are more likely to see cheaper flights to Dublin from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around $681 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dublin from Chicago for as low as $650 on momondo.

You could potentially save up to 7% on your flight if you consider stops on a Chicago to Dublin flight.

As of May 2026, prices for Chicago to Dublin flights are approximately 30% cheaper when compared to flights at the same time last year.

JetBlue, Scandinavian Airlines, and Lufthansa are the most popular carriers operating from Chicago to Dublin

Aer Lingus, United Airlines and American Airlines are the top three most popular airlines that fly to Dublin from Chicago 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 15 different airlines that fly to Dublin on a routine basis, so you have a few additional options to choose from.

Historically, on average around 23% of flights between Chicago and Dublin have experienced a delay on any given week. The average delay length over the past 12 months has been 156 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

According to our data, Aer Lingus have had the least number of delays on this route over the last 12 months; with about 20% of their flights experiencing any sort of delay.

Reykjavik (KEF) was the most common stop: 41% of momondo users choosing 1-stop flights on this route connected there.

Flights via Copenhagen (CPH) offer the lowest average round-trip price of $428.

Flights connecting via Hartford (BDL) have the shortest average one-way travel time: 9h 43m.

Hartford (BDL) has the shortest average layover time for this route: 1h 21m.

As of May 2026, 20 flights take off from Chicago and land in Dublin each day. The most common flight departure time for this route is 8:00PM, with 80% of daily flights taking off in the evening.

As of May 2026, 140 flights take off from Chicago and land in Dublin each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.