HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ireland

$234+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DUB
dic. 6 — dic. 131
sáb. 12/6
sáb. 12/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Ireland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 noviembre 6, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$433
(KLM)

One-way from

$234
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$616

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.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Dublin flights.
Search Deals
From Illinois to Ireland
Search Deals
One-way flight from Illinois to Ireland
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($124 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Ireland.
Search Deals
Price to beat on a one-way flight from Illinois to Ireland.
Search Deals

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 noviembre 6, 2025.

This KLM deal was found by Cheapflights users on 11/5. 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.
dom. 11/97:02 pmSTL - DUB
1 stop30h 43mMultiple Airlines
mar. 11/2510:45 amDUB - STL
1 stop11h 48mMultiple Airlines
Deal found 11/5$424
This KLM deal was found by Cheapflights users on 11/4. 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.
mar. 12/29:00 amSTL - DUB
1 stop16h 45mKLM
mar. 12/99:45 amDUB - STL
1 stop13h 04mKLM
Deal found 11/4$433
This Delta deal was found by Cheapflights users on 11/4. 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.
mar. 12/29:00 amSTL - DUB
1 stop16h 45mDelta
mar. 12/910:45 amDUB - STL
2 stops16h 02mDelta
Deal found 11/4$438
This Delta deal was found by Cheapflights users on 11/5. 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.
dom. 11/91:35 pmSTL - DUB
2 stops13h 45mDelta
mar. 11/258:50 amDUB - STL
2 stops19h 08mDelta
Deal found 11/5$443
This KLM deal was found by Cheapflights users on 11/3. 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.
mar. 12/29:00 amSTL - DUB
1 stop16h 45mMultiple Airlines
jue. 12/116:00 amDUB - STL
2 stops17h 10mMultiple Airlines
Deal found 11/3$452
This United Airlines deal was found by Cheapflights users on 11/5. 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.
vie. 11/141:20 pmPIA - DUB
1 stop12h 50mUnited Airlines
lun. 11/179:00 amDUB - PIA
2 stops42h 31mUnited Airlines
Deal found 11/5$455
This United Airlines deal was found by Cheapflights users on 11/5. 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.
mié. 11/512:31 pmSTL - DUB
1 stop13h 39mUnited Airlines
dom. 11/99:00 amDUB - STL
2 stops39h 47mUnited Airlines
Deal found 11/5$455
This Delta deal was found by Cheapflights users on 11/3. 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.
mar. 12/26:39 amSTL - DUB
2 stops19h 06mDelta
jue. 12/116:00 amDUB - STL
2 stops17h 10mDelta
Deal found 11/3$457
This Delta deal was found by Cheapflights users on 11/5. 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.
jue. 11/66:00 amSTL - DUB
1 stop19h 45mDelta
mar. 11/119:45 amDUB - STL
1 stop19h 38mDelta
Deal found 11/5$458
This KLM deal was found by Cheapflights users on 11/6. 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.
mié. 11/194:25 pmORD - DUB
1 stop17h 55mKLM
mar. 11/259:45 amDUB - ORD
1 stop17h 51mKLM
Deal found 11/6$460
This Cheapflightsfares deal was found by Cheapflights users on 11/5. 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.
vie. 11/78:40 pmORD - DUB
1 stop11h 40mMultiple Airlines
mié. 11/128:50 amDUB - ORD
1 stop14h 10mMultiple Airlines
Deal found 11/5$461
This Delta deal was found by Cheapflights users on 11/5. 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.
dom. 11/166:40 amSTL - DUB
2 stops20h 05mDelta
dom. 11/235:55 amDUB - STL
2 stops16h 54mDelta
Deal found 11/5$461

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 noviembre 6, 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

mar. 12/2

9:00 am-7:45 am

1 stop16h 45m

Dublin

mar. 12/9

9:45 am-4:49 pm

1 stop13h 04m

$433

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 12/2

6:39 am-7:45 am

2 stops19h 06m

Dublin

mar. 12/9

9:45 am-11:29 pm

1 stop19h 44m

$438

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

lun. 2/2

9:59 am-8:45 am

2 stops16h 46m

Dublin

mar. 2/10

10:45 am-11:39 pm

2 stops18h 54m

$438

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 12/2

9:00 am-7:45 am

1 stop16h 45m

Dublin

jue. 12/11

6:00 am-5:10 pm

2 stops17h 10m

$452

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

dom. 11/16

9:33 am-7:45 am

1 stop16h 12m

Dublin

dom. 11/23

9:45 am-9:58 pm

1 stop18h 13m

$458

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

lun. 12/1

7:05 am-7:45 am

1 stop18h 40m

Dublin

lun. 12/8

9:45 am-5:56 pm

1 stop14h 11m

$458

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

mar. 1/13

8:56 am-7:10 am

2 stops16h 14m

Dublin

mié. 1/21

9:00 am-8:25 pm

2 stops41h 25m

$462

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 1/6

6:40 pm-7:10 am

2 stops54h 30m

Dublin

mié. 1/21

9:00 am-5:18 pm

2 stops38h 18m

$462

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

lun. 2/2

6:35 pm-8:10 am

Nonstop7h 35m

Dublin

mié. 2/11

5:10 am-1:10 pm

1 stop14h 00m

$463

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

jue. 11/27

12:49 pm-7:45 am

1 stop12h 56m

Dublin

mié. 12/3

11:30 am-9:57 pm

2 stops16h 27m

$463

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 60 results
1
2
3
...
6

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 $379). 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 noviembre 6, 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 noviembre 6, 2025.

The most flights from USIL to IE0 are scheduled on a Wednesday (13 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (10 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 KLM, Delta, and United Airlines fly from Illinois to Ireland in about 16h 14m. The time it takes to get you to your destination can typically vary by up to 2h 52m. The distance between Illinois and Ireland is about 3661 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?

    $278 is the cheapest one-way deal found within the past few days, from Scandinavian Airlines. You may also be able to find cheap deals on British Airways and American Airlines, with prices starting from $390 and $455, 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 $379). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Ireland

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Charles de Gaulle flights
Newark to Charles de Gaulle flights
John F Kennedy Intl to Istanbul flights
John F Kennedy Intl to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to Gatwick flights
Newark to Orly flights
Boston to Heathrow flights
LaGuardia to Heathrow flights
John F Kennedy Intl to London City flights
Newark to Leonardo da Vinci/Fiumicino flights
Miami to Madrid flights
Newark to Gatwick flights
John F Kennedy Intl to Orly flights
Dulles Intl to Heathrow flights
Los Angeles to Heathrow flights
LaGuardia to Gatwick flights
Los Angeles to Charles de Gaulle flights
LaGuardia to Charles de Gaulle flights
John F Kennedy Intl to Stansted flights
Newark to Madrid flights
John F Kennedy Intl to Madrid flights
John F Kennedy Intl to Malpensa flights
San Francisco to Heathrow flights
John F Kennedy Intl to Barcelona-El Prat flights
O'Hare Intl to Heathrow flights
Boston to Charles de Gaulle flights
Dallas/Fort Worth to Heathrow flights
Newark to Malpensa flights
John F Kennedy Intl to Luton flights
Newark to London City flights
John F Kennedy Intl to Lisbon flights
Newark to Barcelona-El Prat flights
O'Hare Intl to Charles de Gaulle flights
Baltimore to Heathrow flights
Newark to Dublin flights
Dulles Intl to Charles de Gaulle flights
Newark to Frankfurt flights
John F Kennedy Intl to Dublin flights
San Francisco to Charles de Gaulle flights
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
Dulles Intl to Madrid flights
Seattle to Heathrow flights
John F Kennedy Intl to Amsterdam flights
Newark to Lisbon flights
Dallas/Fort Worth to Leonardo da Vinci/Fiumicino flights
Newark to Amsterdam flights
John F Kennedy Intl to Frankfurt flights
Newark to Stansted flights

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 noviembre 6, 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%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.