Cheap flights from Ireland to Illinois from $432
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 12/7. 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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Fly from
Fly to
Route
Depart
Return
DublinChicago
DUB Dublin - ORD Chicago O'Hare Intl
DUBORD
Dublin
Tue 12/15
11:30 am-5:20 pm
1 stop11h 50m
Chicago O'Hare Intl
Tue 1/5
6:30 pm-10:15 am
1 stop9h 45m
DublinChicago
DUB Dublin - ORD Chicago O'Hare Intl
DUBORD
Dublin
Mon 11/23
11:30 am-5:20 pm
1 stop11h 50m
Chicago O'Hare Intl
Mon 11/30
6:30 pm-10:15 am
1 stop9h 45m
DublinChicago
DUB Dublin - ORD Chicago O'Hare Intl
DUBORD
Dublin
Tue 11/3
11:30 am-5:20 pm
1 stop11h 50m
Chicago O'Hare Intl
Sun 11/8
6:30 pm-10:15 am
1 stop9h 45m
DublinChicago
DUB Dublin - ORD Chicago O'Hare Intl
DUBORD
Dublin
Mon 1/25
11:30 am-5:20 pm
1 stop11h 50m
Chicago O'Hare Intl
Fri 1/29
6:30 pm-10:15 am
1 stop9h 45m
DublinChicago
DUB Dublin - ORD Chicago O'Hare Intl
DUBORD
Dublin
Wed 1/13
4:40 pm-7:15 pm
Nonstop8h 35m
Chicago O'Hare Intl
Tue 2/9
9:00 pm-10:25 am
Nonstop7h 25m
DublinChicago
DUB Dublin - ORD Chicago O'Hare Intl
DUBORD
Dublin
Sat 11/14
11:30 am-2:10 pm
Nonstop8h 40m
Chicago O'Hare Intl
Tue 12/1
8:05 pm-9:30 am
Nonstop7h 25m
DublinChicago
DUB Dublin - ORD Chicago O'Hare Intl
DUBORD
Dublin
Sat 11/14
11:30 am-2:10 pm
Nonstop8h 40m
Chicago O'Hare Intl
Tue 12/1
3:55 pm-5:15 am
Nonstop7h 20m
DublinChicago
DUB Dublin - ORD Chicago O'Hare Intl
DUBORD
Dublin
Sun 11/15
9:00 am-5:43 pm
1 stop14h 43m
Chicago O'Hare Intl
Thu 12/3
6:30 pm-8:10 am
Nonstop7h 40m
DublinChicago
DUB Dublin - ORD Chicago O'Hare Intl
DUBORD
Dublin
Sun 11/15
9:00 am-3:38 pm
1 stop12h 38m
Chicago O'Hare Intl
Thu 12/3
3:35 pm-7:30 am
1 stop9h 55m
DublinChicago
DUB Dublin - ORD Chicago O'Hare Intl
DUBORD
Dublin
Sat 11/14
9:00 am-3:38 pm
1 stop12h 38m
Chicago O'Hare Intl
Thu 12/3
5:30 pm-9:55 am
1 stop10h 25m
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 $526, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of November, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $587.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Ireland to Illinois is on a Sunday when prices can be found for as low as $717. Flights from Ireland to Illinois on a Saturday will generally be more expensive and average around $942. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Ireland to Illinois during this time can be as low as $782. Flights in the morning are often more expensive with an average ticket price of $793.
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 from Ireland to Illinois?
You are more likely to see cheaper flights to Illinois from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $690 when searching 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 $536 on momondo.
What cabin class options are available on Ireland to Illinois flights?
There are 3 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.
How many flights depart from Ireland to Illinois on average per day?
The number of flights available between Ireland and Illinois is 12 per day as of October 2026. The most frequent departure time is 11:00AM, with 69% of daily flights leaving at noon.
How many flights depart from Ireland to Illinois on average per week?
As of October 2026, 89 flights take off from Ireland and land in Illinois 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 Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ireland to Illinois
Frequently asked questions about flying from Ireland to Illinois
When did momondo last update prices for flights from Ireland to Illinois?
Prices for flights from Ireland to Illinois were last updated today.
How many operators does momondo search for flights from Ireland to Illinois?
There are 2 operators available for flights from Ireland to Illinois as of October 2026.
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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers 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 Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois 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 license 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 Illinois?
Based on momondo bookings for flights between Ireland and Illinois, the leading plane model is Airbus A330-300, making up 30.40% of the total bookings. Other popular models include Boeing 787-8 Dreamliner with 28.60%, Boeing 767-300 with 16.71%, and Airbus A330 with 8.35%.
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 $148 | Free Cancellation | Rating 7.3 1,817 reviews | |||
| PriceFrom $479 | Free Cancellation | Rating 7.4 10,319 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ireland to Illinois?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ireland to Illinois. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Ireland to Illinois with flexible booking policies on momondo?
All flight searches from Ireland to Illinois on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Ireland to Illinois?
Once all potential Ireland to Illinois 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 Illinois right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Ireland to Illinois 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.