Cheap flights from Ireland to Illinois from €269
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 Illinois departing on 22/5. 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 Illinois
Recent return flight deals from Ireland to Illinois
Recent one-way flight deals from Ireland to Illinois
Recent last minute flight deals from Ireland to Illinois
Recent direct flight deals from Ireland to Illinois
Aer Lingus flights from Ireland to Illinois
Our best Aer Lingus deals on Ireland to Illinois flight tickets
Delta flights from Ireland to Illinois
Our best Delta deals on Ireland to Illinois flight tickets
See travel insights to Illinois from
How to get the cheapest flight ticket from Ireland to Illinois
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 Illinois?
The cheapest month to fly to Illinois from Ireland is in November. Flight prices, which tend to average around €377, are often lower during this time because this is during the off-season. If you’re not able to fly to Illinois in November, then September is your next best option. Flight prices from Ireland to Illinois during September average around €456.
What is the cheapest day to depart on your flight to Illinois?
According to our data, Monday is the cheapest day to fly to Illinois from Ireland. The lowest ticket price found for a Monday departure recently was €620. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from Ireland because it is more convenient for both business and leisure travellers. As a result, prices tend to be around €748.
What is the cheapest time of day to depart on your flight to Illinois?
According to our data, the cheapest time of day to fly to Illinois is in the evening. momondo users have found flights departing from Ireland to Illinois in the evening for as low as €536. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the morning because they tend to be around €669. Of course, these prices can vary depending on the time of year and what airport you fly to.
What is the cheapest Ireland to Illinois flight route?
Fly from Shannon to Chicago O'Hare Intl for the best Ireland - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Ireland when booking 19 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around €528 when searching 19 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Ireland for as low as €440 on momondo.
What cabin class options are available on Ireland to Illinois flights?
There are 2 cabin classes available to choose from on Ireland to Illinois 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 Illinois?
Icelandair, WestJet, and Aer Lingus are the most popular carriers operating from Ireland to Illinois
Which airlines fly to Illinois?
Aer Lingus, United Airlines and British Airways are the top three most popular airlines that fly to Illinois from Ireland according to our data. Aer Lingus is the first choice among our users, with 65% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 7 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ireland to Illinois on average per day?
As of May 2025, 11 flights take off from Ireland and land in Illinois each day. The most common flight departure time for this route is 11:00, with 74% of daily flights taking off at midday.
How many flights depart from Ireland to Illinois on average per week?
As of May 2025, there are 81 flights per week flying from Ireland to Illinois. The most common day of the week flights depart is Thu, with 15% of flights taking off on this day.
Cheap Ireland to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ireland to Illinois
When did momondo last update prices for flights from Ireland to Illinois?
Prices for flights from Ireland to Illinois are updated daily.
How many operators does momondo search for flights from Ireland to Illinois?
As of May 2025, there are 8 operators available to choose from for flights from Ireland to Illinois.
How old do you have to be to fly from Ireland to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Ireland to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Ireland to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Ireland to Illinois is Boeing 787-8 Dreamliner (32.50% of total bookings). The next most popular plane models are Airbus A330-300 (23.75%), Boeing 787 Dreamliner (22.96%), and Airbus A330 (8.53%).
Best airlines flying from Ireland to Illinois
Compare and see reviews for airlines that fly from Ireland to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom €335 | Free Cancellation | Rating 7.0 487 reviews | |||
| PriceFrom €344 | Free Cancellation | Rating 6.6 6,846 reviews | |||
| PriceFrom €355 | Free Cancellation | Rating 7.6 1,275 reviews | |||
| PriceFrom €359 | Free Cancellation | Rating 7.0 1,076 reviews | |||
| PriceFrom €367 | Free Cancellation | Rating 7.4 8,697 reviews | |||
| PriceFrom €411 | Free Cancellation | Rating 7.0 2,703 reviews | |||
| PriceFrom €451 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ireland to Illinois?
It is quick and easy to find Ireland to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.
Can I find flights from Ireland to Illinois with flexible booking policies on momondo?
Flights from Ireland to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Ireland to Illinois?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Ireland.
I’m not ready to book a flight from Ireland to Illinois right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Ireland to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.