Cheap flights from Dublin to Chicago from €377

The cheapest month to fly to Chicago from Dublin is in September. Flight prices, which tend to average around €238, are often lower during this time because this is during the off-season. If you don’t want to visit Chicago in September, then you should wait until January to fly from Dublin, when ticket prices are also cheap, with an average price of €320.

On average, the least expensive day to fly to Chicago from Dublin is on a Thursday. momondo users have found tickets for Thursday departures for as low as €646. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Chicago on Sunday is €795.

In the afternoon is the cheapest time of day to fly from Dublin to Chicago when you can find flight prices for as low as €617. Flying to Chicago in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at midday when prices are €806 on average. Flights to Chicago from Dublin at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to Chicago from Dublin when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around €593 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Dublin for as low as €503 on momondo.

There are 3 cabin classes available to choose from on Dublin to Chicago 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 8% on your flight if you consider stops on a Dublin to Chicago flight.

As of July 2026, prices for Dublin to Chicago flights are approximately 22% cheaper when compared to flights at the same time last year.

Icelandair and Delta are the most popular carriers operating from Dublin to Chicago

Aer Lingus, Finnair and United Airlines are the top three most popular airlines that fly to Chicago from Dublin according to our data. Aer Lingus is the first choice among our users, with 71% of people opting to fly with this airline when travelling to Chicago. Keep in mind that there are 4 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

Historically, on average around 14% of flights between Dublin and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 145 minutes.

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

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

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 8% of their flights experiencing any sort of delay.

Reykjavik (KEF) was the most common stop: 39% of momondo users choosing one-stop flights on this route connected there.

Flights via Copenhagen (CPH) offer the lowest average return price of €385.

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 11h 25m.

Washington, D.C. (IAD) has the shortest average stopover time for this route: 0h 56m.

The number of flights available between Dublin and Chicago is 19 per day as of July 2026. The most frequent departure time is 11:00, with 79% of daily flights leaving at midday.

As of July 2026, there are 135 flights per week flying from Dublin to Chicago. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.