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$336+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ORD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Ireland to Illinois

Keep the following information in mind while searching for Ireland to Illinois flight deals. Data was last updated September 11, 2025.

Round-trip from

$454
(lastminute.com)

One-way from

$336
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$519

Good round-trip deal

$531 or less

Good one-way deal

$572 or less
From Ireland to Illinois
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One-way flight from Ireland to Illinois
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Highest demand for flights based on searches. 14% potential increase in price ($102 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Ireland to Illinois.
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Price to beat on a one-way flight from Ireland to Illinois.
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Find 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 September 11, 2025.

This TravelUp deal was found by Cheapflights users on 9/11. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/611:45 amDUB - ORD
1 stop11h 51mMultiple Airlines
Sun 10/1210:35 pmORD - DUB
1 stop15h 00mMultiple Airlines
Deal found 9/11$451
This lastminute.com deal was found by Cheapflights users on 9/9. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2411:35 amDUB - ORD
Nonstop8h 25mAer Lingus
Wed 10/19:15 pmORD - DUB
Nonstop7h 25mAer Lingus
Deal found 9/9$454
This Flighttix deal was found by Cheapflights users on 9/11. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/135:55 amDUB - ORD
1 stop15h 00mLufthansa
Wed 10/228:20 pmORD - DUB
Nonstop7h 25mLufthansa
Deal found 9/11$455
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/138:45 amDUB - ORD
1 stop13h 10mAmerican Airlines
Tue 10/2110:35 pmORD - DUB
1 stop12h 30mAmerican Airlines
Deal found 9/11$456
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/198:35 amDUB - ORD
1 stop12h 15mAmerican Airlines
Sat 10/114:55 pmORD - DUB
1 stop10h 40mAmerican Airlines
Deal found 9/10$457
This Lufthansa deal was found by Cheapflights users on 9/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/255:55 amDUB - ORD
1 stop15h 00mLufthansa
Sun 10/58:20 pmORD - DUB
Nonstop7h 25mLufthansa
Deal found 9/11$458
This Icelandair deal was found by Cheapflights users on 9/9. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/182:15 pmDUB - ORD
1 stop13h 00mIcelandair
Wed 10/17:25 pmORD - DUB
1 stop11h 50mIcelandair
Deal found 9/9$459
This Lufthansa deal was found by Cheapflights users on 9/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:55 amDUB - ORD
1 stop13h 00mMultiple Airlines
Wed 11/56:50 pmORD - DUB
1 stop16h 55mMultiple Airlines
Deal found 9/11$460
This Delta deal was found by Cheapflights users on 9/10. 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 10/315:55 amDUB - ORD
1 stop14h 25mDelta
Mon 11/34:56 pmORD - DUB
2 stops16h 49mDelta
Deal found 9/10$461
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Fri 9/194:40 pmDUB - ORD
Nonstop8h 20mAer Lingus
Sun 9/289:15 pmORD - DUB
Nonstop7h 25mAer Lingus
Deal found 9/10$462
This British Airways deal was found by Cheapflights users on 9/11. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/278:50 amDUB - ORD
2 stops20h 03mBritish Airways
Fri 11/74:06 pmORD - DUB
2 stops16h 14mBritish Airways
Deal found 9/11$463
This TravelUp deal was found by Cheapflights users on 9/10. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/188:35 amDUB - ORD
1 stop12h 15mMultiple Airlines
Sat 9/2710:15 pmORD - DUB
Nonstop7h 25mMultiple Airlines
Deal found 9/10$464

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 September 11, 2025.
Use the filters below to find and compare flights from Ireland to Illinois that are best for you.

Fly from

Ireland

Fly to

Illinois

Route

Depart

Return

Price

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 10/30

9:20 am-9:05 pm

1 stop16h 45m

Chicago O'Hare Intl

Wed 11/12

6:35 pm-8:10 am

Nonstop7h 35m

$455

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 9/25

5:55 am-2:55 pm

1 stop15h 00m

Chicago O'Hare Intl

Sun 9/28

8:20 pm-9:45 am

Nonstop7h 25m

$458

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 9/25

5:55 am-2:55 pm

1 stop15h 00m

Chicago O'Hare Intl

Sun 10/5

8:20 pm-9:45 am

Nonstop7h 25m

$458

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 10/26

5:55 am-3:20 pm

1 stop14h 25m

Chicago O'Hare Intl

Tue 11/4

5:20 pm-3:45 pm

1 stop16h 25m

$459

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 1/29

11:30 am-4:45 pm

2 stops35h 15m

Chicago O'Hare Intl

Sun 2/1

7:10 pm-7:35 pm

2 stops18h 25m

$459

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 9/23

5:55 am-2:55 pm

1 stop15h 00m

Chicago O'Hare Intl

Tue 9/30

8:20 pm-9:45 am

Nonstop7h 25m

$459

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 9/25

5:55 am-2:55 pm

1 stop15h 00m

Chicago O'Hare Intl

Mon 9/29

8:20 pm-9:45 am

Nonstop7h 25m

$459

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 10/31

5:55 am-3:20 pm

1 stop14h 25m

Chicago O'Hare Intl

Mon 11/3

4:56 pm-3:45 pm

2 stops16h 49m

$461

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 11/1

8:50 am-3:20 pm

1 stop11h 30m

Chicago O'Hare Intl

Fri 11/7

10:37 am-7:50 am

2 stops15h 13m

$461

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 11/27

11:30 am-2:00 pm

Nonstop8h 30m

Chicago O'Hare Intl

Sun 11/30

7:40 pm-9:00 am

Nonstop7h 20m

$462

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 60 results
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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, August is the cheapest month in which you can book a flight from Ireland to Illinois (average of $245). Flying from Ireland to Illinois in March is currently the most expensive (average of $321). 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 September 11, 2025.

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 September 11, 2025.

The most flights from IE0 to USIL are scheduled on a Monday (19 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (15 on average).

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 September 11, 2025.
Peruse reviews from past customers who have flown with United Airlines, Aer Lingus, and Lufthansa 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
8,937 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Aer Lingus
7.2
Good
1,271 reviews
United Airlines
7.4
Good
8,937 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Lufthansa
6.8
Okay
7,409 reviews
United Airlines
7.4
Good
8,937 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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 15h 35m. Fly via Lufthansa, Delta, or KLM to get the fastest option. Airlines will cover a distance of 3664 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 Aer Lingus. According to our data, you can fly for as low as $459. Users have also found prices from $498 and $674 on Icelandair and Delta, 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, August is the cheapest month in which you can book a flight from Ireland to Illinois (average of $245). Flying from Ireland to Illinois in March is currently the most expensive (average of $321). 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 3 airlines flying from Ireland to Illinois

Discover the top 3 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$393Average$514FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$447Average$581FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$473Average$752FlexibilityNo cancel feeOn-time69%

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