Cheap flights from Ireland to Chicago from €225
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to Chicago departing on 12/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Scandinavian Airlines flights from Ireland to Chicago
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American Airlines flights from Ireland to Chicago
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How to get the cheapest flight ticket from Ireland to Chicago
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Chicago?
The cheapest month to fly to Chicago from Ireland is in November. Flight prices, which tend to average around €440, are often lower during this time because this is during the off-season. If you don’t want to visit Chicago in November, then you should wait until September to fly from Ireland, when ticket prices are also cheap, with an average price of €449.
What is the cheapest day to depart on your flight to Chicago?
On average, the least expensive day to fly to Chicago from Ireland is on a Monday. momondo users have found tickets for Monday departures for as low as €623. 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 €699.
What is the cheapest time of day to depart on your flight to Chicago?
In the evening is the cheapest time of day to fly from Ireland to Chicago when you can find flight prices for as low as €524. Flying to Chicago in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are €655 on average. Flights to Chicago from Ireland in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.
What is the cheapest Ireland to Chicago flight route?
Fly from Dublin to Chicago O'Hare Intl for the best Ireland - Chicago flight prices
How far in advance should I book a flight to Chicago?
You are more likely to see cheaper flights to Chicago from Ireland when booking 20 weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around €519 when searching 20 weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Ireland for as low as €422 on momondo.
What cabin class options are available on Ireland to Chicago flights?
There are 2 cabin classes available to choose from on Ireland to Chicago flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Ireland to Chicago?
Scandinavian Airlines, Icelandair, and TAP AIR PORTUGAL are the most popular carriers operating from Ireland to Chicago
Which airlines fly to Chicago?
Aer Lingus, United Airlines and British Airways are the top three most popular airlines that fly to Chicago from Ireland according to our data. Aer Lingus is the first choice among our users, with 63% of people opting to fly with this airline when travelling to Chicago. Keep in mind that there are 7 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ireland to Chicago on average per day?
The number of flights available between Ireland and Chicago is 17 per day as of June 2025. The most frequent departure time is 11:00, with 51% of daily flights leaving at midday.
How many flights depart from Ireland to Chicago on average per week?
As of June 2025, there are 122 flights per week flying from Ireland to Chicago. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.
Cheap Ireland to Chicago flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ireland to Chicago
When did momondo last update prices for flights from Ireland to Chicago?
Prices for flights from Ireland to Chicago were last updated today.
How many operators does momondo search for flights from Ireland to Chicago?
There are 7 operators available for flights from Ireland to Chicago as of June 2025.
How old do you have to be to fly from Ireland to Chicago?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ireland to Chicago.
What documentation or ID do you need to fly to Chicago?
The travel and health documents you'll need for your trip to Chicago may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Chicago. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Ireland to Chicago?
momondo data reveals that the most frequently booked plane model on the route from Ireland to Chicago is Boeing 787-8 Dreamliner, representing 34.88% of all bookings. The subsequent popular models are Boeing 787 Dreamliner at 23.16%, Airbus A330-300 at 19.99%, and Airbus A330 at 8.63%.
Best airlines flying from Ireland to Chicago
Compare and see reviews for airlines that fly from Ireland to Chicago with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom €336 | Free Cancellation | Rating 6.6 7,028 reviews | |||
| PriceFrom €340 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom €347 | Free Cancellation | Rating 7.6 1,292 reviews | |||
| PriceFrom €351 | Free Cancellation | Rating 7.1 1,118 reviews | |||
| PriceFrom €379 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom €402 | Free Cancellation | Rating 7.0 2,778 reviews | |||
| PriceFrom €441 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ireland to Chicago?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ireland to Chicago. momondo saves you time and could save you money on your trip.
Can I find flights from Ireland to Chicago with flexible booking policies on momondo?
momondo does allow users to show only those flights to Chicago from Ireland which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Ireland to Chicago?
Once all potential Ireland to Chicago flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Ireland to Chicago right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Ireland to Chicago flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.