HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ireland

$205+ 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DUB
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
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 January 8, 2026.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$370
(Ticket)

One-way from

$205
(oojo)

Popular in

June

Cheapest in

February

Average price

$564

Good round-trip deal

$587 or less

Good one-way deal

$420 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. 14% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 8, 2026.

This Ticket deal was found by Cheapflights users on 1/8. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/196:40 pmSTL - DUB
2 stops30h 30mAir Canada
Wed 2/49:00 amDUB - STL
1 stop12h 15mAir Canada
Deal found 1/8$370
This oojo deal was found by Cheapflights users on 1/7. 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.
Mon 4/271:54 pmORD - ORK
2 stops14h 51mBritish Airways
Wed 5/64:15 pmORK - ORD
2 stops27h 45mBritish Airways
Deal found 1/7$401
This KAYAK deal was found by Cheapflights users on 1/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2210:00 pmSTL - DUB
1 stop15h 35mBritish Airways
Thu 4/305:30 pmDUB - STL
1 stop32h 00mBritish Airways
Deal found 1/6$401
This KAYAK deal was found by Cheapflights users on 1/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/141:29 pmSTL - DUB
2 stops14h 46mBritish Airways
Wed 4/228:40 amDUB - STL
1 stop16h 50mBritish Airways
Deal found 1/8$406
This Ticket deal was found by Cheapflights users on 1/8. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/191:35 pmSTL - DUB
2 stops15h 40mBritish Airways
Wed 2/410:00 amDUB - STL
2 stops16h 13mBritish Airways
Deal found 1/8$408
This KAYAK deal was found by Cheapflights users on 1/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/12:00 pmSTL - DUB
2 stops15h 15mBritish Airways
Tue 3/1010:55 amDUB - STL
2 stops15h 16mBritish Airways
Deal found 1/6$411
This KAYAK deal was found by Cheapflights users on 1/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/21:35 pmSTL - DUB
2 stops15h 40mBritish Airways
Mon 2/96:30 pmDUB - STL
2 stops30h 04mBritish Airways
Deal found 1/6$412
This Gurufare deal was found by Cheapflights users on 1/7. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/95:16 pmPIA - DUB
2 stops16h 04mBritish Airways
Mon 2/167:45 pmDUB - PIA
2 stops28h 40mBritish Airways
Deal found 1/7$413
This Ovago deal was found by Cheapflights users on 1/6. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/311:05 amSTL - DUB
2 stops16h 30mBritish Airways
Tue 2/108:45 amDUB - STL
2 stops17h 28mBritish Airways
Deal found 1/6$413
This KAYAK deal was found by Cheapflights users on 1/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/119:35 pmSTL - DUB
1 stop14h 40mBritish Airways
Wed 8/198:40 amDUB - STL
2 stops16h 43mBritish Airways
Deal found 1/7$414
This KAYAK deal was found by Cheapflights users on 1/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/912:11 pmSTL - SNN
2 stops17h 19mBritish Airways
Tue 3/37:50 amSNN - STL
2 stops21h 32mBritish Airways
Deal found 1/8$415
This United Airlines deal was found by Cheapflights users on 1/8. 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 1/191:15 pmSTL - DUB
1 stop12h 55mUnited Airlines
Wed 2/49:00 amDUB - STL
1 stop12h 15mUnited Airlines
Deal found 1/8$415

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 January 8, 2026.
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

PeoriaDublin

PIA - DUB

PIADUB

Greater Peoria

Mon 2/9

5:16 pm-3:20 pm

2 stops16h 04m

Dublin

Mon 2/16

7:45 pm-6:25 pm

2 stops28h 40m

$413

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 2/9

12:11 pm-11:30 am

2 stops17h 19m

Shannon

Tue 3/3

7:50 am-11:22 pm

2 stops21h 32m

$415

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Tue 3/24

10:45 pm-3:40 pm

1 stop11h 55m

Dublin

Tue 3/31

6:30 am-12:25 pm

1 stop11h 55m

$424

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Tue 3/24

10:45 pm-7:05 pm

1 stop15h 20m

Dublin

Mon 3/30

8:30 pm-1:50 pm

1 stop23h 20m

$424

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Mon 3/23

6:10 pm-1:35 pm

1 stop14h 25m

Dublin

Mon 3/30

8:30 pm-1:50 pm

1 stop23h 20m

$424

ChicagoCork

ORD - ORK

ORDORK

Chicago O'Hare Intl

Tue 3/24

9:35 pm-9:00 pm

1 stop18h 25m

Cork

Thu 4/9

8:30 pm-3:00 pm

1 stop24h 30m

$424

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Wed 4/1

4:15 pm-8:15 am

1 stop10h 00m

Dublin

Tue 4/7

9:50 am-7:58 am

2 stops28h 08m

$429

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Wed 3/4

7:20 pm-6:10 pm

2 stops40h 50m

Dublin

Sun 3/8

7:05 pm-5:45 pm

1 stop27h 40m

$431

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Wed 3/18

2:15 pm-9:20 am

1 stop14h 05m

Dublin

Wed 3/25

11:30 am-6:31 pm

1 stop12h 01m

$435

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

Wed 3/18

7:05 am-7:45 am

1 stop19h 40m

Dublin

Wed 3/25

9:45 am-9:34 pm

1 stop16h 49m

$435

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

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 $351). Flying from Illinois to Ireland in June is currently the most expensive (average of $673). 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 January 8, 2026.

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

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 January 8, 2026.

The most flights from USIL to IE0 are scheduled on a Monday (10 on average). You will have fewer flight options on Tuesday, 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 British Airways, United Airlines, and Delta fly from Illinois to Ireland in about 10h. The time it takes to get you to your destination can typically vary by up to 6h 04m. 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?

    $215 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 Icelandair and JetBlue, with prices starting from $275 and $288, 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 $351). Flying from Illinois to Ireland in June is currently the most expensive (average of $673). 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
John F Kennedy Intl to Charles de Gaulle flights
Newark to Heathrow flights
Newark to Charles de Gaulle flights
John F Kennedy Intl to Leonardo da Vinci/Fiumicino flights
Newark to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to Istanbul flights
Boston to Heathrow flights
Newark to Orly flights
LaGuardia to Heathrow flights
John F Kennedy Intl to Lisbon flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to Orly flights
John F Kennedy Intl to London City flights
Newark to Athens flights
Newark to Gatwick flights
Newark to Dublin flights
Los Angeles to Heathrow flights
Newark to Lisbon flights
LaGuardia to Charles de Gaulle flights
O'Hare Intl to Heathrow flights
Newark to Madrid flights
John F Kennedy Intl to Dublin flights
Newark to Malpensa flights
John F Kennedy Intl to Madrid flights
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to Malpensa flights
John F Kennedy Intl to Gatwick flights
Dallas/Fort Worth to Heathrow flights
Newark to Barcelona-El Prat flights
John F Kennedy Intl to Barcelona-El Prat flights
Miami to Madrid flights
O'Hare Intl to Charles de Gaulle flights
John F Kennedy Intl to Stansted flights
Boston to Charles de Gaulle flights
Dulles Intl to Charles de Gaulle flights
San Francisco to Heathrow flights
LaGuardia to Gatwick flights
Baltimore to Heathrow flights
Boston to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to Amsterdam flights
Los Angeles to Charles de Gaulle flights
Seattle to Heathrow flights
John F Kennedy Intl to Athens flights
LaGuardia to Leonardo da Vinci/Fiumicino flights
Boston to Dublin flights
Dulles Intl to Leonardo da Vinci/Fiumicino flights
Dallas/Fort Worth to Leonardo da Vinci/Fiumicino flights
O'Hare Intl to Dublin flights
Boston to Gatwick 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$568FlexibilityNo cancel feeOn-time62%
IcelandairCheapest$345Average$539FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$393Average$501FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$400Average$470FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$470Average$708FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$473Average$818FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$487Average$836FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$488Average$703FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$498Average$669FlexibilityNo cancel feeOn-time70%
FinnairCheapest$499Average$831FlexibilityNo cancel feeOn-time76%

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.