Cheap flights from Chicago O'Hare Intl Airport to Dublin from $223

In general, January 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 $514. If you’re not able to fly to Dublin in January, then February is your next best option. Flight prices from Chicago O'Hare Intl Airport to Dublin during February average around $518.

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 $726. Flights from Chicago O'Hare Intl Airport to Dublin on a Friday will generally be more expensive and average around $825. 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 $734. 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 $791.

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 $670 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 $632 on momondo.

There are 3 cabin classes available to choose from on Chicago O'Hare Intl to Dublin flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 3% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Dublin flight.

As of March 2026, prices for Chicago O'Hare Intl Airport to Dublin flights are approximately 24% cheaper when compared to flights at the same time last year.

Lufthansa, United Airlines, and TAP AIR PORTUGAL 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 62% 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 22% 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 153 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 19% of their flights experiencing any sort of delay.

Reykjavik (KEF) was the most common stop: 58% 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 Toronto (YYZ) have the shortest average one-way travel time: 10h 02m.

Toronto (YYZ) has the shortest average layover time for this route: 2h 11m.

The number of flights available between Chicago O'Hare Intl Airport and Dublin is 13 per day as of March 2026. The most frequent departure time is 7:00PM, with 66% of daily flights leaving in the evening.

As of March 2026, 93 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 Wed, with 15% of weekly flights taking off on this day.