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.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Ireland to Chicago
Recent return flight deals from Ireland to Chicago
Recent one-way flight deals from Ireland to Chicago
Recent last minute flight deals from Ireland to Chicago
Recent direct flight deals from Ireland to Chicago
American Airlines flights from Ireland to Chicago O'Hare Intl Airport
Our best American Airlines deals on Ireland to Chicago O'Hare Intl Airport flight tickets
Scandinavian Airlines flights from Ireland to Chicago O'Hare Intl Airport
Our best Scandinavian Airlines deals on Ireland to Chicago O'Hare Intl Airport flight tickets
See travel insights to Chicago from
How to get the cheapest flight ticket from Ireland to Chicago O'Hare Intl Airport
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 O'Hare Intl Airport?
In general, February is the cheapest month to fly from Ireland to Chicago O'Hare Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around €436. If you are unable to visit Chicago O'Hare Intl Airport during the month of February, then departing from Ireland during the month November is also very affordable. Most momondo users find prices during this month for around €445.
What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?
On average, the least expensive day to fly to Chicago O'Hare Intl Airport 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. The most expensive day to fly to Chicago O'Hare Intl Airport is Sunday, with ticket prices averaging around €699.
What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?
Our data shows that the cheapest Ireland to Chicago O'Hare Intl Airport flights are usually those with departure times in the evening. Our users have found flights to Chicago O'Hare Intl Airport in the evening for as low as €524. Flights to Chicago O'Hare Intl Airport are more costly in the morning, with an average ticket price of €655. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Ireland to Chicago O'Hare Intl flight route?
Fly from Dublin to Chicago O'Hare Intl for the best Ireland - Chicago O'Hare Intl flight prices
How far in advance should I book a flight to Chicago O'Hare Intl Airport?
You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Ireland when booking 20 weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport 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 O'Hare Intl Airport from Ireland for as low as €422 on momondo.
What cabin class options are available on Ireland to Chicago O'Hare Intl flights?
There are 2 cabin classes available to choose from on Ireland 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.
What is the cheapest airline that flies from Ireland to Chicago O'Hare Intl?
Icelandair, TAP AIR PORTUGAL, and Aer Lingus are the most popular carriers operating from Ireland to Chicago O'Hare Intl
Which airlines fly to Chicago O'Hare Intl Airport?
Aer Lingus, United Airlines and British Airways are the top three most popular airlines that fly to Chicago O'Hare Intl Airport 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 O'Hare Intl Airport. Keep in mind that there are 7 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ireland to Chicago O'Hare Intl Airport on average per day?
The number of flights available between Ireland and Chicago O'Hare Intl Airport 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 O'Hare Intl Airport on average per week?
As of June 2025, 122 flights take off from Ireland and land in Chicago O'Hare Intl Airport each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.
Cheap Ireland to Chicago O'Hare Intl Airport flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ireland to Chicago O'Hare Intl Airport
When did momondo last update prices for flights from Ireland to Chicago O'Hare Intl Airport?
Prices for flights from Ireland to Chicago O'Hare Intl Airport refresh daily.
How many operators does momondo search for flights from Ireland to Chicago O'Hare Intl Airport?
There are 7 operators available for flights from Ireland to Chicago O'Hare Intl Airport as of June 2025.
How old do you have to be to fly from Ireland to Chicago O'Hare Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ireland to Chicago O'Hare Intl Airport.
What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?
The necessary travel and health documents for your Chicago O'Hare Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Ireland to Chicago O'Hare Intl Airport?
Based on momondo bookings for flights between Ireland and Chicago O'Hare Intl Airport, the leading plane model is Boeing 787-8 Dreamliner, making up 34.88% of the total bookings. Other popular models include Boeing 787 Dreamliner with 23.16%, Airbus A330-300 with 19.99%, and Airbus A330 with 8.63%.
Best airlines flying from Ireland to Chicago O'Hare Intl Airport
Compare and see reviews for airlines that fly from Ireland to Chicago O'Hare Intl Airport 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 |
Travelling to a place near Chicago?
Book flights to Chicago if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ireland to Chicago?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ireland to Chicago . Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Ireland to Chicago with flexible booking policies on momondo?
Yes. All flights to Chicago from Ireland on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Ireland to Chicago?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ireland to Chicago.
I’m not ready to book a flight from Ireland to Chicago right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Ireland to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.