Cheap flights from Dublin to Chicago from €277

In general, November is the cheapest month to fly from Dublin to Chicago O'Hare Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around €411. If you are unable to visit Chicago O'Hare Intl Airport during the month of November, then departing from Dublin during the month September is also very affordable. Most momondo users find prices during this month for around €423.

On average, the least expensive day to fly to Chicago O'Hare Intl Airport from Dublin is on a Thursday. momondo users have found tickets for Thursday departures for as low as €611. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Chicago O'Hare Intl Airport is Tuesday, with ticket prices averaging around €749.

Our data shows that the cheapest Dublin to Chicago O'Hare Intl Airport flights are usually those with departure times in the afternoon. Our users have found flights to Chicago O'Hare Intl Airport in the afternoon for as low as €601. Flights to Chicago O'Hare Intl Airport are more costly at midday, with an average ticket price of €715. Departure times at midday fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Dublin when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around €551 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Dublin for as low as €417 on momondo.

There are 3 cabin classes available to choose from on Dublin to Chicago O'Hare Intl 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 22% on your flight if you consider stops on a Dublin to Chicago O'Hare Intl Airport flight.

As of March 2026, prices for Dublin to Chicago O'Hare Intl Airport flights are approximately 25% more expensive when compared to flights at the same time last year.

JetBlue is the most popular carrier operating from Dublin to Chicago O'Hare Intl

Aer Lingus, United Airlines and American Airlines are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from Dublin according to our data. Aer Lingus is the first choice among our users, with 79% of people opting to fly with this airline when travelling to Chicago O'Hare Intl Airport. Keep in mind that there are 3 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 13% 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 137 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.

Monday 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 7% of their flights experiencing any sort of delay.

Copenhagen (CPH) was the most common stop: 31% of momondo users choosing one-stop flights on this route connected there.

Flights via Copenhagen (CPH) offer the lowest average return price of €468.

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 O'Hare Intl Airport is 10 per day as of March 2026. The most frequent departure time is 10:00, with 76% of daily flights leaving at midday.

As of March 2026, there are 74 flights per week flying from Dublin to Chicago O'Hare Intl Airport. The most common day of the week flights depart is Mon, with 18% of flights taking off on this day.