Cheap flights from Chicago O'Hare Intl Airport to Dublin from $259

In general, February is the cheapest month to fly from Chicago O'Hare Intl Airport to Dublin. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $518. If you’re not able to fly to Dublin in February, then January is your next best option. Flight prices from Chicago O'Hare Intl Airport to Dublin during January average around $520.

The cheapest day to depart from Chicago O'Hare Intl Airport to Dublin is on a Monday. Travelers who choose to depart for Dublin on a Monday will often find tickets for as low as $786. Flights from Chicago O'Hare Intl Airport to Dublin on a Saturday will generally be more expensive and average around $904. 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 O'Hare Intl Airport to Dublin when you can find flight prices for as low as $804. 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 $886.

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

You are more likely to see cheaper flights to Dublin from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around $719 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dublin from Chicago O'Hare Intl Airport for as low as $674 on momondo.

There are 4 cabin classes available to choose from on Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl to Dublin

Aer Lingus, United Airlines and American Airlines are the top three most popular airlines that fly to Dublin from Chicago O'Hare Intl Airport according to our data. Aer Lingus is the first choice among our users, with 66% 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.

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 154 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.

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

According to our data, American Airlines have had the least number of delays on this route over the last 12 months; with about 16% of their flights experiencing any sort of delay.

Toronto (YYZ) was the most common stop: 57% of momondo users choosing 1-stop flights on this route connected there.

Flights via Toronto (YYZ) offer the lowest average round-trip price of $471.

Flights connecting via Charlotte (CLT) have the shortest average one-way travel time: 10h 42m.

Charlotte (CLT) has the shortest average layover time for this route: 1h 09m.

The number of flights available between Chicago O'Hare Intl Airport and Dublin is 11 per day as of October 2026. The most frequent departure time is 7:00PM, with 84% of daily flights leaving in the evening.

As of October 2026, 79 flights take off from Chicago O'Hare Intl Airport and land in Dublin each week. The most common flight departure day for this route is Mon, with 18% of weekly flights taking off on this day.