Cheap flights from Dublin to Chicago from £299

The cheapest month to fly to Chicago O'Hare Intl Airport from Dublin is in November. Flight prices, which tend to average around £351, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Chicago O'Hare Intl Airport from Dublin during September instead. Flights to Chicago O'Hare Intl Airport in September, while not as cheap as those in November, still average around £361.

The cheapest day to depart from Dublin to Chicago O'Hare Intl Airport is on a Tuesday. Travellers who choose to depart for Chicago O'Hare Intl Airport on a Tuesday will often find tickets for as low as £534. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Chicago O'Hare Intl Airport on Saturday is £617.

The cheapest time of day to fly to Chicago O'Hare Intl Airport is in the afternoon when flights can be purchased for as low as £484. In contrast, the most expensive time of day to depart to Chicago O'Hare Intl Airport is at midday when prices are around £607.

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 £483 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 £357 on momondo.

No. A direct flight is the cheapest option for a flight between Dublin to Chicago O'Hare Intl Airport.

As of April 2026, prices for Dublin to Chicago O'Hare Intl Airport flights are approximately 7% cheaper when compared to flights at the same time last year.

JetBlue and Finnair are the most popular carriers operating from Dublin to Chicago O'Hare Intl

Aer Lingus, United Airlines and Finnair 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 68% of people opting to fly with this airline when travelling to Chicago O'Hare Intl Airport. Keep in mind that there are 5 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 138 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 8% of their flights experiencing any sort of delay.

Reykjavik (KEF) was the most common stop: 67% of momondo users choosing one-stop flights on this route connected there.

Flights via London (LHR) offer the lowest average return price of £1,173.

Flights connecting via London (LHR) have the shortest average one-way travel time: 12h 15m.

London (LHR) has the shortest average stopover time for this route: 2h 33m.

12 flights are operational daily from Dublin to Chicago O'Hare Intl Airport as of April 2026. The most popular departure time for this route is 11:00, with 70% of flights per day taking off at midday.

As of April 2026, there are 86 flights per week flying from Dublin to Chicago O'Hare Intl Airport. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.