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$220+ Cheap flights from Illinois to Ireland

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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DUB
Dec 24 — Dec 311
Wed 12/24
Wed 12/31
1 adult, Economy
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Cheap flight deals from Illinois to Ireland

Keep the following information in mind while searching for Illinois to Ireland flight deals. Data was last updated November 24, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$423
(Kiwi.com)

One-way from

$220
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$617

Good round-trip deal

$593 or less

Good one-way deal

$452 or less
Provider with most accurate pricing for Chicago (CHI)-Dublin flight deals.
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From Illinois to Ireland
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One-way flight from Illinois to Ireland
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Highest demand for flights based on searches. 14% potential increase in price ($117 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Illinois to Ireland.
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Price to beat on a one-way flight from Illinois to Ireland.
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Find flight deals from Illinois to Ireland

Cheapest flights from Illinois to Ireland
Explore the most affordable flight options available from Illinois to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 24, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:00 pmSTL - DUB
1 stop13h 10mLufthansa
Thu 12/1110:40 amDUB - STL
1 stop12h 23mLufthansa
Deal found 11/24$423
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2811:38 amSTL - DUB
1 stop13h 52mAustrian Airlines
Fri 12/59:30 amDUB - STL
1 stop20h 12mAustrian Airlines
Deal found 11/24$432
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/511:50 amSTL - DUB
1 stop13h 40mAustrian Airlines
Tue 12/99:30 amDUB - STL
1 stop20h 12mAustrian Airlines
Deal found 11/24$433
This oojo deal was found by Cheapflights users on 11/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/288:15 pmORD - DUB
1 stop21h 05mTAP AIR PORTUGAL
Thu 12/44:25 amDUB - ORD
1 stop17h 00mTAP AIR PORTUGAL
Deal found 11/24$448
This Kiwi.com deal was found by Cheapflights users on 11/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:35 pmORD - DUB
1 stop12h 00mLufthansa
Mon 1/125:55 pmDUB - ORD
1 stop26h 15mLufthansa
Deal found 11/22$453
This oojo deal was found by Cheapflights users on 11/23. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:20 pmORD - DUB
1 stop17h 00mScandinavian Airlines
Thu 12/411:30 amDUB - ORD
2 stops35h 15mScandinavian Airlines
Deal found 11/23$455
This United Airlines deal was found by Cheapflights users on 11/21. 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 12/110:51 amPIA - DUB
1 stop15h 19mUnited Airlines
Sun 12/79:00 amDUB - PIA
2 stops32h 59mUnited Airlines
Deal found 11/21$455
This United Airlines deal was found by Cheapflights users on 11/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/58:30 amSTL - DUB
1 stop19h 50mUnited Airlines
Wed 12/109:00 amDUB - STL
2 stops42h 58mUnited Airlines
Deal found 11/23$455
This United Airlines deal was found by Cheapflights users on 11/22. 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 12/299:15 pmORD - DUB
1 stop31h 05mUnited Airlines
Fri 1/169:00 amDUB - ORD
1 stop31h 06mUnited Airlines
Deal found 11/22$456
This lol.travel deal was found by Cheapflights users on 11/24. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2811:38 amSTL - DUB
1 stop16h 17mLufthansa
Fri 12/125:10 amDUB - STL
1 stop14h 45mLufthansa
Deal found 11/24$457
This SmartFares deal was found by Cheapflights users on 11/21. 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.
Sun 12/78:25 pmORD - DUB
1 stop13h 45mTAP AIR PORTUGAL
Tue 12/164:55 pmDUB - ORD
1 stop28h 05mTAP AIR PORTUGAL
Deal found 11/21$458
This Kiwi.com deal was found by Cheapflights users on 11/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:30 pmORD - DUB
1 stop33h 45mIcelandair
Wed 12/1011:30 amDUB - ORD
1 stop11h 50mIcelandair
Deal found 11/22$459

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Ireland 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 November 24, 2025.
Use the filters below to find and compare flights from Illinois to Ireland that are best for you.

Fly from

Illinois

Fly to

Ireland

Route

Depart

Return

Price

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Thu 1/22

6:30 am-8:10 am

1 stop19h 40m

Dublin

Mon 1/26

9:00 am-10:00 pm

2 stops43h 00m

$455

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 2/16

6:45 pm-8:10 am

1 stop31h 25m

Dublin

Mon 2/23

9:00 am-10:14 pm

2 stops43h 14m

$455

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Fri 12/5

5:44 pm-9:55 am

1 stop10h 11m

Dublin

Mon 12/8

9:00 am-9:58 pm

2 stops42h 58m

$455

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Thu 1/29

11:20 am-8:10 am

1 stop14h 50m

Dublin

Mon 2/2

9:00 am-8:58 pm

2 stops41h 58m

$455

PeoriaDublin

PIA - DUB

PIADUB

Greater Peoria

Wed 1/7

10:45 am-7:30 am

2 stops14h 45m

Dublin

Wed 1/14

9:00 am-2:23 pm

2 stops35h 23m

$460

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Fri 12/5

3:19 pm-9:55 am

2 stops12h 36m

Dublin

Wed 12/10

9:00 am-9:58 pm

2 stops42h 58m

$460

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Wed 1/14

7:20 pm-10:00 am

2 stops32h 40m

Dublin

Wed 1/28

11:30 am-4:45 pm

2 stops35h 15m

$462

PeoriaDublin

PIA - DUB

PIADUB

Greater Peoria

Tue 4/21

6:41 pm-2:45 pm

2 stops14h 04m

Dublin

Tue 5/5

10:30 am-9:28 pm

2 stops16h 58m

$463

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Mon 1/19

5:10 pm-9:50 am

1 stop10h 40m

Dublin

Fri 1/30

8:50 am-6:45 pm

1 stop15h 55m

$467

ChicagoShannon

ORD - SNN

ORDSNN

Chicago O'Hare Intl

Tue 4/7

5:40 pm-4:10 pm

1 stop16h 30m

Shannon

Thu 4/16

9:15 pm-11:55 am

1 stop20h 40m

$468

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/22

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Ireland

Have a flexible travel schedule? Discover the best time to fly to Ireland from Illinois 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 Illinois to Ireland

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Ireland (average of $377). Flying from Illinois to Ireland in June is currently the most expensive (average of $678). 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 IL to IE?

Find hourly flight availability from Illinois to Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 24, 2025.

A simple way to save on the total cost of your ticket is to fly from Illinois to Ireland at noon. If you’re flexible enough to do this you can expect to save up to 27% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Illinois to Ireland?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Ireland. Price data was last updated on November 3, 2024.

Travelers seeking maximum savings on their Illinois to Ireland flight should consider departing on Saturday mornings when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Illinois to Ireland

Explore weekly flight availability from Illinois to Ireland. 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 November 24, 2025.

The most flights from USIL to IE0 are scheduled on a Monday (14 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (9 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Ireland. 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 Illinois to Ireland?

    Airlines like United Airlines, Scandinavian Airlines, and British Airways fly from Illinois to Ireland in about 14h 04m. The time it takes to get you to your destination can typically vary by up to 18h 36m. The distance between Illinois and Ireland is about 3791 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $399 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from $405 and $419, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Ireland 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 Illinois to Ireland?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Ireland (average of $377). Flying from Illinois to Ireland in June is currently the most expensive (average of $678). 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

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Alternative routes for Illinois to Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Illinois to Ireland

Discover the top 10 airlines that operate flights from Illinois to Ireland. 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 November 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$557FlexibilityNo cancel feeOn-time62%
IcelandairCheapest$346Average$556FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$393Average$502FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$400Average$479FlexibilityNo cancel feeOn-time77%
SWISSCheapest$473Average$818FlexibilityNo cancel feeOn-time79%
LufthansaCheapest$476Average$744FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$494Average$721FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$512Average$865FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$522Average$870FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$523Average$674FlexibilityNo cancel feeOn-time67%

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