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Ireland

$260+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DUB
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$499
(Iberia)

One-way from

$260
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$810

Good round-trip deal

$612 or less

Good one-way deal

$489 or less
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. 17% potential increase in price ($143 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Delta deal was found by Cheapflights users on 7/3. 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.
Tue 11/2512:10 pmSTL - DUB
1 stop13h 35mDelta
Tue 12/29:45 amDUB - STL
1 stop13h 02mDelta
Deal found 7/3$479
This United Airlines deal was found by Cheapflights users on 7/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/611:45 amSTL - DUB
1 stop14h 25mUnited Airlines
Wed 11/129:00 amDUB - STL
1 stop12h 29mUnited Airlines
Deal found 7/3$498
This Iberia deal was found by Cheapflights users on 7/2. 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.
Wed 8/201:15 pmSTL - DUB
1 stop11h 15mIberia
Tue 8/266:20 pmDUB - STL
2 stops30h 03mIberia
Deal found 7/2$499
This Ovago deal was found by Cheapflights users on 7/2. 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.
Mon 7/285:27 pmSTL - DUB
2 stops18h 53mBritish Airways
Wed 8/65:55 pmDUB - STL
2 stops32h 52mBritish Airways
Deal found 7/2$510
This Mytrip deal was found by Cheapflights users on 7/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/164:05 pmSTL - DUB
1 stop10h 10mMultiple Airlines
Thu 10/235:55 amDUB - STL
2 stops15h 23mMultiple Airlines
Deal found 7/3$512
This Air Canada deal was found by Cheapflights users on 7/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/44:05 pmSTL - DUB
2 stops33h 40mAir Canada
Tue 9/169:20 amDUB - STL
1 stop16h 37mAir Canada
Deal found 7/2$513
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Sat 8/167:32 amSTL - DUB
1 stop15h 58mAmerican Airlines
Sat 8/239:30 amDUB - STL
1 stop17h 17mAmerican Airlines
Deal found 7/1$517
This KLM deal was found by Cheapflights users on 7/3. 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.
Mon 7/2810:46 amSTL - DUB
1 stop15h 59mKLM
Wed 8/61:20 pmDUB - STL
2 stops16h 33mKLM
Deal found 7/3$521
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Tue 8/56:05 pmORD - SNN
Nonstop7h 25mUnited Airlines
Wed 8/209:30 amSNN - ORD
Nonstop8h 15mUnited Airlines
Deal found 7/1$522
This KLM deal was found by Cheapflights users on 7/3. 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.
Tue 8/194:20 pmORD - ORK
1 stop18h 30mKLM
Tue 8/266:00 amORK - ORD
1 stop14h 10mKLM
Deal found 7/3$525
This United Airlines deal was found by Cheapflights users on 7/2. 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 8/116:15 amSTL - SNN
2 stops19h 15mUnited Airlines
Wed 8/209:30 amSNN - STL
1 stop12h 14mUnited Airlines
Deal found 7/2$528
This Lufthansa deal was found by Cheapflights users on 7/3. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:43 pmSTL - DUB
2 stops15h 42mLufthansa
Tue 12/25:10 pmDUB - STL
1 stop26h 45mLufthansa
Deal found 7/3$529

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 July 3, 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

Wed 8/20

1:15 pm-6:30 am

1 stop11h 15m

Dublin

Tue 8/26

6:20 pm-6:23 pm

2 stops30h 03m

$499

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 9/8

4:20 pm-9:15 am

1 stop10h 55m

Dublin

Fri 9/19

6:00 am-4:37 pm

2 stops16h 37m

$501

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 8/19

4:00 pm-7:45 am

2 stops33h 45m

Dublin

Mon 8/25

9:20 am-3:21 pm

2 stops36h 01m

$505

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 7/28

5:27 pm-6:20 pm

2 stops18h 53m

Dublin

Wed 8/6

5:55 pm-8:47 pm

2 stops32h 52m

$510

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sat 8/16

7:32 am-5:30 am

1 stop15h 58m

Dublin

Sat 8/23

9:30 am-8:47 pm

1 stop17h 17m

$517

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sat 8/16

9:15 am-8:15 am

1 stop17h 00m

Dublin

Sat 8/23

11:35 am-3:44 pm

1 stop10h 09m

$519

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 7/28

10:46 am-8:45 am

1 stop15h 59m

Dublin

Wed 8/6

1:20 pm-11:53 pm

2 stops16h 33m

$521

ChicagoShannon

ORD - SNN

ORDSNN

Chicago O'Hare Intl

Tue 8/5

6:05 pm-7:30 am

Nonstop7h 25m

Shannon

Wed 8/20

9:30 am-11:45 am

Nonstop8h 15m

$522

ChicagoCork

ORD - ORK

ORDORK

Chicago O'Hare Intl

Tue 8/19

4:20 pm-4:50 pm

1 stop18h 30m

Cork

Tue 8/26

6:00 am-2:10 pm

1 stop14h 10m

$525

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 8/11

1:20 pm-7:30 am

1 stop12h 10m

Shannon

Wed 8/20

9:30 am-3:44 pm

1 stop12h 14m

$528

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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, November is the cheapest month in which you can book a flight from Illinois to Ireland (average of $509). Flying from Illinois to Ireland in June is currently the most expensive (average of $929). 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 July 3, 2025.

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 July 3, 2025.

The most flights from USIL to IE0 are scheduled on a Monday (17 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (17 on average).

Reviews of airlines servicing Ireland

Get insights into the airlines that provide service to Ireland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ireland. Reviews last updated July 3, 2025.
Read reviews from past customers who have flown Delta, Porter Airlines, and KLM from Illinois to Ireland. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Porter Airlines
8.0
Very good
298 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,654 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    $291 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 WestJet, with prices starting from $326 and $336, 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, November is the cheapest month in which you can book a flight from Illinois to Ireland (average of $509). Flying from Illinois to Ireland in June is currently the most expensive (average of $929). 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$355Average$549FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$393Average$481FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$400Average$484FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$446Average$707FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$473Average$818FlexibilityNo cancel feeOn-time79%
KLMCheapest$482Average$731FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$489Average$936FlexibilityNo cancel feeOn-time71%
IberiaCheapest$511Average$732FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$513Average$886FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$519Average$660FlexibilityNo cancel feeOn-time70%

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