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$247+ 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DUB
ene. 7 — ene. 141
mié. 1/7
mié. 1/14
1 adult, Economy
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Cheap 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 diciembre 8, 2025.

This United Airlines deal was found by Cheapflights users on 12/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/298:05 amSTL - DUB
1 stop18h 05mUnited Airlines
mié. 1/149:00 amDUB - STL
1 stop12h 29mUnited Airlines
Deal found 12/6$464
This Expedia deal was found by Cheapflights users on 12/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/71:00 pmSTL - DUB
1 stop13h 10mLufthansa
dom. 12/145:10 amDUB - STL
1 stop14h 45mLufthansa
Deal found 12/6$467
This Booking.com deal was found by Cheapflights users on 12/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/710:00 amSTL - DUB
2 stops15h 10mMultiple Airlines
dom. 12/145:10 amDUB - STL
1 stop14h 45mMultiple Airlines
Deal found 12/6$469
This Finnair deal was found by Cheapflights users on 12/6. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/2911:41 amSTL - DUB
2 stops14h 59mMultiple Airlines
mié. 1/1411:30 amDUB - STL
2 stops29h 35mMultiple Airlines
Deal found 12/6$474
This Iberia deal was found by Cheapflights users on 12/7. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/82:54 pmSTL - DUB
2 stops15h 41mMultiple Airlines
lun. 12/1511:30 amDUB - STL
1 stop15h 08mMultiple Airlines
Deal found 12/7$475
This FlightHub deal was found by Cheapflights users on 12/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/81:00 pmSTL - DUB
1 stop13h 10mLufthansa
lun. 12/1510:40 amDUB - STL
1 stop12h 23mLufthansa
Deal found 12/7$480
This Mytrip deal was found by Cheapflights users on 12/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1111:25 amSTL - DUB
2 stops13h 45mMultiple Airlines
mar. 12/1610:40 amDUB - STL
1 stop12h 23mMultiple Airlines
Deal found 12/6$481
This KLM deal was found by Cheapflights users on 12/7. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/104:32 pmSTL - DUB
1 stop10h 13mKLM
mié. 12/249:45 amDUB - STL
1 stop19h 53mKLM
Deal found 12/7$484
This Delta deal was found by Cheapflights users on 12/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/76:00 amSTL - DUB
2 stops20h 45mDelta
dom. 12/148:50 amDUB - STL
2 stops20h 52mDelta
Deal found 12/6$486
This KLM deal was found by Cheapflights users on 12/7. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/1011:40 amSTL - DUB
2 stops15h 05mMultiple Airlines
mié. 12/2411:30 amDUB - STL
2 stops16h 46mMultiple Airlines
Deal found 12/7$488
This Delta deal was found by Cheapflights users on 12/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/89:50 amSTL - ORK
2 stops31h 35mDelta
mar. 12/235:15 pmORK - STL
2 stops33h 26mDelta
Deal found 12/6$495
This FlightHub deal was found by Cheapflights users on 12/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/78:25 pmORD - DUB
1 stop13h 45mTAP AIR PORTUGAL
mar. 12/164:55 pmDUB - ORD
1 stop28h 05mTAP AIR PORTUGAL
Deal found 12/7$531

Find flight deals from Illinois to Ireland

Keep the following information in mind while searching for Illinois to Ireland flight deals. Data was last updated diciembre 8, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$422
(Scandinavian Airlines)

One-way from

$247
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$825

Good round-trip deal

$597 or less

Good one-way deal

$393 or less
Provider with most accurate pricing for Chicago (CHI)-Dublin flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Dublin flights.
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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 ($117 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 December 2025
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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.
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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 diciembre 8, 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

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

mié. 1/7

6:30 pm-10:15 am

1 stop9h 45m

Dublin

sáb. 1/17

11:30 am-5:20 pm

1 stop11h 50m

$429

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

jue. 1/22

8:05 am-8:10 am

1 stop18h 05m

Dublin

lun. 1/26

9:00 am-10:00 pm

2 stops43h 00m

$456

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

jue. 1/29

11:20 am-8:10 am

1 stop14h 50m

Dublin

lun. 2/2

9:00 am-9:59 pm

2 stops42h 59m

$456

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

lun. 2/9

9:57 am-7:30 am

2 stops15h 33m

Dublin

dom. 2/22

9:00 am-10:14 pm

2 stops43h 14m

$460

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

sáb. 1/24

11:20 am-7:30 am

2 stops14h 10m

Dublin

sáb. 1/31

9:00 am-2:30 pm

2 stops35h 30m

$460

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

dom. 4/26

8:50 am-7:20 am

1 stop16h 30m

Dublin

mar. 5/5

9:50 am-5:10 pm

2 stops37h 20m

$461

PeoriaDublin

PIA - DUB

PIADUB

Greater Peoria

jue. 1/22

5:16 pm-5:25 pm

2 stops18h 09m

Dublin

jue. 1/29

8:50 am-10:21 pm

2 stops19h 31m

$462

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

mar. 3/31

8:15 pm-9:45 am

Nonstop7h 30m

Dublin

mié. 4/8

9:50 am-6:18 pm

1 stop14h 28m

$469

ChicagoDublin

ORD - DUB

ORDDUB

Chicago O'Hare Intl

dom. 3/29

8:15 pm-9:45 am

Nonstop7h 30m

Dublin

mié. 4/8

9:50 am-5:45 pm

1 stop13h 55m

$469

ChicagoShannon

ORD - SNN

ORDSNN

Chicago O'Hare Intl

lun. 4/27

10:35 pm-4:10 pm

1 stop11h 35m

Shannon

mié. 5/6

9:15 pm-5:00 pm

1 stop25h 45m

$470

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

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 $362). Flying from Illinois to Ireland in June is currently the most expensive (average of $676). 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 diciembre 8, 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 December 16, 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 diciembre 8, 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 (13 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 Icelandair, United Airlines, and British Airways fly from Illinois to Ireland in about 9h 45m. The time it takes to get you to your destination can typically vary by up to 8h 24m. 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?

    $213 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 TAP AIR PORTUGAL and Icelandair, with prices starting from $215 and $233, 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 $362). Flying from Illinois to Ireland in June is currently the most expensive (average of $676). 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 diciembre 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$51Average$557FlexibilityNo cancel feeOn-time62%
IcelandairCheapest$346Average$536FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$393Average$501FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$400Average$473FlexibilityNo cancel feeOn-time77%
SWISSCheapest$473Average$818FlexibilityNo cancel feeOn-time79%
Aer LingusCheapest$478Average$714FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$488Average$741FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$512Average$688FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$518Average$876FlexibilityNo cancel feeOn-time69%
Brussels AirlinesCheapest$522Average$918FlexibilityNo cancel feeOn-timeN/A

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