Cheap flights from Dublin to Chicago from $320

The month of September is, on average, the cheapest month to fly to Chicago from Dublin, with most prices found around $469. If you’re not able to fly to Chicago in September, then November is your next best option. Flight prices from Dublin to Chicago during November average around $472.

The cheapest day to depart on your flight to Chicago is on a Sunday when prices can be found for as low as $717. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Dublin to Chicago for around $861.

Our most recent data shows that the best time of day to fly to Chicago is in the afternoon. Flights from Dublin to Chicago during this time can be as low as $778. In contrast, the most expensive time of day to depart to Chicago is at noon when prices are around $857.

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 $639 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Dublin for as low as $483 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 28% on your flight if you consider stops on a Dublin to Chicago flight.

As of March 2026, prices for Dublin to Chicago flights are approximately 33% more expensive when compared to flights at the same time last year.

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 136 minutes.

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

Monday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 8% of their flights experiencing any sort of delay.

As of March 2026, there are 9 flights per day flying from Dublin to Chicago. The most common time of day flights depart is 10:00AM, with 63% of flights taking off at noon.

The number of flights available between Dublin and Chicago is 67 per week as of March 2026. The most frequent departure day is Wed, with 19% of weekly flights leaving on this day.