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Ireland

$203+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DUB
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
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 October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$465
(United Airlines)

One-way from

$203
(SmartFares)

Popular in

June

Cheapest in

February

Average price

$643

Good round-trip deal

$588 or less

Good one-way deal

$427 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 ($120 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 October 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 October 14, 2025.

This KLM deal was found by Cheapflights users on 10/13. 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.
Tue 10/214:10 pmSTL - DUB
1 stop11h 05mKLM
Wed 11/59:45 amDUB - STL
1 stop12h 25mKLM
Deal found 10/13$433
This United Airlines deal was found by Cheapflights users on 10/12. 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 11/266:30 amSTL - DUB
1 stop19h 40mUnited Airlines
Wed 12/39:00 amDUB - STL
2 stops37h 28mUnited Airlines
Deal found 10/12$465
This American Airlines deal was found by Cheapflights users on 10/13. 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.
Tue 11/115:10 pmORD - SNN
1 stop12h 20mAmerican Airlines
Wed 11/197:50 amSNN - ORD
1 stop12h 00mAmerican Airlines
Deal found 10/13$470
This American Airlines deal was found by Cheapflights users on 10/12. 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.
Sun 11/96:30 pmORD - SNN
1 stop11h 00mAmerican Airlines
Tue 11/187:50 amSNN - ORD
1 stop13h 35mAmerican Airlines
Deal found 10/12$471
This Cheapflightsfares deal was found by Cheapflights users on 10/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2112:25 pmSTL - DUB
2 stops15h 30mLufthansa
Wed 11/55:10 amDUB - STL
1 stop14h 45mLufthansa
Deal found 10/12$473
This United Airlines deal was found by Cheapflights users on 10/14. 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 11/289:44 amDEC - DUB
1 stop16h 26mUnited Airlines
Fri 12/59:00 amDUB - DEC
2 stops38h 52mUnited Airlines
Deal found 10/14$476
This United deal was found by Cheapflights users on 10/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2611:05 amSTL - DUB
1 stop15h 05mMultiple Airlines
Wed 12/35:10 amDUB - STL
1 stop14h 45mMultiple Airlines
Deal found 10/12$477
This Cheapflightsfares deal was found by Cheapflights users on 10/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2110:36 amSTL - DUB
1 stop13h 54mIberia
Wed 11/511:30 amDUB - STL
1 stop15h 30mIberia
Deal found 10/12$479
This United Airlines deal was found by Cheapflights users on 10/12. 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 11/108:25 amSTL - DUB
1 stop19h 55mUnited Airlines
Mon 11/179:00 amDUB - STL
2 stops39h 47mUnited Airlines
Deal found 10/12$480
This Orbitz deal was found by Cheapflights users on 10/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:43 pmSTL - DUB
2 stops16h 27mMultiple Airlines
Mon 11/176:35 pmDUB - STL
2 stops50h 54mMultiple Airlines
Deal found 10/13$483
This Delta deal was found by Cheapflights users on 10/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:00 amSTL - DUB
2 stops21h 20mDelta
Fri 11/145:55 amDUB - STL
2 stops16h 12mDelta
Deal found 10/11$486
This Expedia deal was found by Cheapflights users on 10/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:43 pmSTL - DUB
2 stops30h 27mAir Canada
Mon 11/179:00 amDUB - STL
2 stops36h 47mAir Canada
Deal found 10/12$487

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 October 14, 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

ChicagoShannon

ORD - SNN

ORDSNN

Chicago O'Hare Intl

Tue 11/11

5:10 pm-11:30 am

1 stop12h 20m

Shannon

Wed 11/19

7:50 am-1:50 pm

1 stop12h 00m

$470

ChicagoShannon

ORD - SNN

ORDSNN

Chicago O'Hare Intl

Sun 11/9

6:30 pm-11:30 am

1 stop11h 00m

Shannon

Tue 11/18

7:50 am-3:25 pm

1 stop13h 35m

$471

DecaturDublin

DEC - DUB

DECDUB

Decatur Arpt

Fri 11/28

9:44 am-8:10 am

1 stop16h 26m

Dublin

Fri 12/5

9:00 am-5:52 pm

2 stops38h 52m

$476

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 11/10

8:25 am-10:20 am

1 stop19h 55m

Dublin

Mon 11/17

9:00 am-6:47 pm

2 stops39h 47m

$480

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 10/21

6:00 am-8:45 am

1 stop20h 45m

Dublin

Tue 10/28

5:55 am-6:02 pm

2 stops17h 07m

$486

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 11/4

9:31 am-9:20 am

2 stops17h 49m

Dublin

Wed 11/12

8:50 am-9:58 pm

2 stops19h 08m

$486

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Tue 1/6

12:01 pm-11:10 am

2 stops17h 09m

Cork

Tue 1/20

11:55 am-10:59 pm

2 stops17h 04m

$486

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 11/4

6:00 am-9:20 am

2 stops21h 20m

Dublin

Thu 11/13

1:25 pm-11:44 pm

2 stops16h 19m

$486

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 11/4

6:00 am-9:20 am

2 stops21h 20m

Dublin

Fri 11/14

5:55 am-4:07 pm

2 stops16h 12m

$486

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 11/4

6:00 am-9:20 am

2 stops21h 20m

Dublin

Tue 11/18

10:45 am-4:33 pm

1 stop11h 48m

$488

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

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 $679). 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 October 14, 2025.

A simple way to save on the total cost of your ticket is to fly from Illinois to Ireland in the evening. If you’re flexible enough to do this you can expect to save up to 18% 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 October 14, 2025.

The most flights from USIL to IE0 are scheduled on a Monday (14 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (14 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 American Airlines, United Airlines, and Delta fly from Illinois to Ireland in about 12h 20m. The time it takes to get you to your destination can typically vary by up to 8h 25m. The distance between Illinois and Ireland is about 3578 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?

    $203 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on United Airlines and KLM, with prices starting from $399 and $414, 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 $679). 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 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 October 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$568FlexibilityNo cancel feeOn-time62%
IcelandairCheapest$374Average$565FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$393Average$502FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$400Average$477FlexibilityNo cancel feeOn-time77%
SWISSCheapest$473Average$818FlexibilityNo cancel feeOn-time79%
LufthansaCheapest$476Average$744FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$496Average$721FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$512Average$875FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$523Average$676FlexibilityNo cancel feeOn-time67%
Turkish AirlinesCheapest$528Average$596FlexibilityNo cancel feeOn-time77%

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