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Illinois

$362+ Cheap flights from Ireland to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ORD
Jul 27 — Aug 31
Mon 7/27
Mon 8/3
1 adult, Economy
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Cheap flight deals from Ireland to Illinois

Cheapest flights from Ireland to Illinois
Explore the most affordable flight options available from Ireland to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 27, 2026.

This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:00 am
DUB
-
ORD
1 stop12h 49m
Delta
Mon 10/125:45 pm
ORD
-
DUB
2 stops15h 40m
Delta
Deal found 6/25$609
This Booking.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/254:45 pm
DUB
-
ORD
Nonstop8h 30m
Aer Lingus
Sat 8/299:00 pm
ORD
-
DUB
Nonstop7h 35m
Aer Lingus
Deal found 6/25$611
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/711:00 am
DUB
-
ORD
1 stop16h 45m
Delta
Mon 10/123:50 pm
ORD
-
DUB
1 stop10h 05m
Delta
Deal found 6/26$612
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/711:00 am
DUB
-
MDW
1 stop17h 10m
Delta
Mon 10/129:55 am
MDW
-
DUB
1 stop16h 00m
Delta
Deal found 6/26$612
This Mytrip deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:40 am
DUB
-
ORD
2 stops29h 20m
Multiple Airlines
Mon 8/3112:30 pm
ORD
-
DUB
3 stops18h 45m
Multiple Airlines
Deal found 6/26$620
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/239:20 am
DUB
-
ORD
1 stop16h 28m
United Airlines
Fri 10/28:20 pm
ORD
-
DUB
Nonstop7h 25m
United Airlines
Deal found 6/25$621
This KLM deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1612:00 pm
DUB
-
MDW
1 stop12h 19m
KLM
Tue 9/221:00 pm
MDW
-
DUB
1 stop13h 45m
KLM
Deal found 6/26$621
This SmartFares deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:30 am
DUB
-
ORD
1 stop12h 05m
JetBlue
Sat 9/56:00 am
ORD
-
DUB
1 stop21h 00m
JetBlue
Deal found 6/26$622
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:35 am
DUB
-
ORD
Nonstop8h 05m
United Airlines
Wed 9/98:20 pm
ORD
-
DUB
Nonstop7h 25m
United Airlines
Deal found 6/25$623
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:55 am
DUB
-
MDW
2 stops18h 38m
Delta
Mon 8/315:45 pm
MDW
-
DUB
1 stop10h 15m
Delta
Deal found 6/23$623
This United Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2110:40 am
DUB
-
ORD
Nonstop8h 40m
United Airlines
Wed 12/306:30 pm
ORD
-
DUB
Nonstop7h 40m
United Airlines
Deal found 6/22$624
This KLM deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:15 am
ORK
-
ORD
1 stop14h 00m
KLM
Tue 9/85:10 pm
ORD
-
ORK
1 stop15h 30m
KLM
Deal found 6/23$624

Find flight deals from Ireland to Illinois

Keep the following information in mind while searching for Ireland to Illinois flight deals. Data was last updated June 27, 2026.

Round-trip from

$609
(Delta)

One-way from

$362
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

$703

Good round-trip deal

$740 or less

Good one-way deal

$690 or less
From Ireland to Illinois
Search Deals
One-way flight from Ireland to Illinois
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Ireland to Illinois.
Search Deals
Price to beat on a one-way flight from Ireland to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ireland to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 27, 2026.
Use the filters below to find and compare flights from Ireland to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CorkChicago

ORK - ORD

ORKORD

Cork

Wed 8/26

6:15 am-2:30 pm

1 stop14h 15m

Chicago O'Hare Intl

Sun 8/30

5:10 pm-2:40 pm

1 stop15h 30m

$624

CorkChicago

ORK - ORD

ORKORD

Cork

Fri 8/28

6:15 am-2:15 pm

1 stop14h 00m

Chicago O'Hare Intl

Tue 9/8

5:10 pm-2:40 pm

1 stop15h 30m

$624

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 10/14

11:35 am-1:40 pm

Nonstop8h 05m

Chicago O'Hare Intl

Wed 10/28

7:35 pm-8:10 am

Nonstop7h 35m

$625

ShannonChicago

SNN - ORD

SNNORD

Shannon

Fri 9/11

9:30 am-11:50 am

Nonstop8h 20m

Chicago O'Hare Intl

Sun 9/20

1:30 pm-10:15 am

1 stop14h 45m

$625

DublinChicago

DUB - MDW

DUBMDW

Dublin

Fri 9/25

12:00 pm-6:19 pm

1 stop12h 19m

Chicago Midway

Wed 9/30

7:01 pm-10:00 am

1 stop8h 59m

$627

CorkChicago

ORK - ORD

ORKORD

Cork

Wed 8/26

5:15 pm-2:15 pm

1 stop27h 00m

Chicago O'Hare Intl

Sun 8/30

4:20 pm-10:35 pm

1 stop24h 15m

$629

ShannonChicago

SNN - ORD

SNNORD

Shannon

Sat 9/12

12:30 pm-12:28 am

1 stop17h 58m

Chicago O'Hare Intl

Sun 9/20

2:32 pm-10:15 am

1 stop13h 43m

$632

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 8/25

11:40 am-4:10 pm

2 stops34h 30m

Chicago O'Hare Intl

Sat 8/29

7:15 pm-10:25 am

2 stops33h 10m

$639

ShannonChicago

SNN - ORD

SNNORD

Shannon

Thu 10/1

7:30 am-1:50 pm

1 stop12h 20m

Chicago O'Hare Intl

Thu 10/8

7:05 pm-4:10 pm

1 stop15h 05m

$653

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 12/13

9:00 am-3:38 pm

1 stop12h 38m

Chicago O'Hare Intl

Thu 12/31

6:30 pm-8:10 am

Nonstop7h 40m

$663

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/23

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Ireland to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Ireland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ireland to Illinois

What is the cheapest month to book a flight from Ireland to Illinois?

Currently, September is the cheapest month in which you can book a flight from Ireland to Illinois (average of $272). Flying from Ireland to Illinois in July is currently the most expensive (average of $625). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IE to IL?

Find hourly flight availability from Ireland to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 27, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ireland to Illinois as you normally would.

Weekly flight availability from Ireland to Illinois

Explore weekly flight availability from Ireland to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 27, 2026.

The most flights from IE0 to USIL are scheduled on a Wednesday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (13 on average).

How far ahead should I book a flight from Ireland to Illinois?

The best time to book flights from Ireland to Illinois is 49 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated June 27, 2026.
Peruse reviews from past customers who have flown with United Airlines and Aer Lingus from Ireland to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,896 reviews

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
9,896 reviews
United Airlines
7.4
Good
9,896 reviews

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Aer Lingus
7.3
Good
1,628 reviews
United Airlines
7.4
Good
9,896 reviews

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

Related info for your journey

Find useful and relevant information for your journey from Ireland to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ireland to Illinois?

    There are many flights that can get you from Ireland to Illinois in 8h 05m. Fly via KLM, Delta, or United Airlines to get the fastest option. Airlines will cover a distance of 3661 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Ireland to Illinois one-way?

    For one-way options, check prices for Icelandair. According to our data, you can fly for as low as $290. Users have also found prices from $416 and $449 on Finnair and Aer Lingus, respectively.

  • Can I find deals for flights from Ireland to Illinois that include hotel bookings?

    Yes. In addition to deals on Ireland to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ireland to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Illinois.

  • Can I find deals for business class flights from Ireland to Illinois?

    Yes. Cheapflights offers flight deals from Ireland to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ireland to Illinois?

    Currently, September is the cheapest month in which you can book a flight from Ireland to Illinois (average of $272). Flying from Ireland to Illinois in July is currently the most expensive (average of $625). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ireland to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Ireland to Illinois

Discover the top 2 airlines that operate flights from Ireland to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$463Average$658FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$479Average$680FlexibilityNo cancel feeOn-time69%

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