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$321+ Cheap flights from Ireland to Illinois

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ORD
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
1 adult, Economy
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Cheap flight deals from Ireland to Illinois

Keep the following information in mind while searching for Ireland to Illinois flight deals. Data was last updated julio 30, 2025.

Round-trip from

$482
(Delta)

One-way from

$321
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$750

Good round-trip deal

$740 or less

Good one-way deal

$641 or less
From Ireland to Illinois
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One-way flight from Ireland to Illinois
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Highest demand for flights based on searches. 15% potential increase in price ($104 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 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 Ireland to Illinois.
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Price to beat on a one-way flight from Ireland to Illinois.
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Find flight deals from Ireland to Illinois

Cheapest flights from Ireland to Illinois
Explore the most affordable flight options available from Ireland to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.

This Delta deal was found by Cheapflights users on 7/29. 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. 9/16:00 amDUB - ORD
2 stops19h 09mDelta
dom. 9/711:05 amORD - DUB
1 stop16h 55mDelta
Deal found 7/29$482
This Delta deal was found by Cheapflights users on 7/29. 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. 9/112:00 pmDUB - MDW
1 stop11h 37mDelta
dom. 9/710:31 amMDW - DUB
1 stop16h 14mDelta
Deal found 7/29$483
This Air Canada deal was found by Cheapflights users on 7/29. 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.
dom. 9/149:20 amDUB - ORD
1 stop35h 40mAir Canada
sáb. 9/276:20 pmORD - DUB
1 stop31h 55mAir Canada
Deal found 7/29$484
This Lufthansa deal was found by Cheapflights users on 7/29. 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.
mar. 9/1611:35 amDUB - ORD
Nonstop8h 00mLufthansa
mié. 10/18:20 pmORD - DUB
Nonstop7h 25mLufthansa
Deal found 7/29$486
This United Airlines deal was found by Cheapflights users on 7/29. 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.
dom. 8/319:30 amSNN - ORD
Nonstop8h 15mUnited Airlines
sáb. 9/67:00 amORD - SNN
2 stops21h 15mUnited Airlines
Deal found 7/29$486
This Finnair deal was found by Cheapflights users on 7/28. 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.
mar. 9/161:45 pmDUB - ORD
Nonstop8h 00mFinnair
lun. 9/2910:15 pmORD - DUB
Nonstop7h 25mFinnair
Deal found 7/28$487
This Air France deal was found by Cheapflights users on 7/28. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/612:00 pmDUB - MDW
1 stop11h 37mAir France
lun. 9/156:15 pmMDW - DUB
1 stop9h 45mAir France
Deal found 7/28$487
This American Airlines deal was found by Cheapflights users on 7/28. 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.
lun. 9/112:45 pmDUB - ORD
1 stop11h 30mAmerican Airlines
lun. 9/88:35 amORD - DUB
1 stop15h 55mAmerican Airlines
Deal found 7/28$488
This United Airlines deal was found by Cheapflights users on 7/28. 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.
jue. 9/411:35 amDUB - ORD
Nonstop8h 00mUnited Airlines
vie. 9/1211:40 amORD - DUB
1 stop13h 30mUnited Airlines
Deal found 7/28$490
This Scandinavian Airlines deal was found by Cheapflights users on 7/30. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/2911:30 amDUB - ORD
2 stops36h 15mScandinavian Airlines
dom. 11/27:20 pmORD - DUB
2 stops18h 15mScandinavian Airlines
Deal found 7/30$494
This KLM deal was found by Cheapflights users on 7/29. 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. 9/1710:00 amDUB - MDW
1 stop13h 35mKLM
dom. 9/281:43 pmMDW - DUB
1 stop12h 12mKLM
Deal found 7/29$495
This TravelUp deal was found by Cheapflights users on 7/29. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/79:30 amDUB - ORD
1 stop15h 20mIberia
sáb. 9/1310:15 pmORD - DUB
Nonstop7h 25mIberia
Deal found 7/29$498

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ireland to Illinois 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 julio 30, 2025.
Use the filters below to find and compare flights from Ireland to Illinois that are best for you.

Fly from

Ireland

Fly to

Illinois

Route

Depart

Return

Price

DublinChicago

DUB - ORD

DUBORD

Dublin

lun. 9/1

6:00 am-7:09 pm

2 stops19h 09m

Chicago O'Hare Intl

dom. 9/7

11:05 am-10:00 am

1 stop16h 55m

$482

DublinChicago

DUB - MDW

DUBMDW

Dublin

lun. 9/1

12:00 pm-5:37 pm

1 stop11h 37m

Chicago Midway

dom. 9/7

10:31 am-8:45 am

1 stop16h 14m

$483

DublinChicago

DUB - ORD

DUBORD

Dublin

dom. 9/14

9:20 am-3:00 pm

1 stop35h 40m

Chicago O'Hare Intl

mar. 9/30

2:00 pm-8:15 am

1 stop12h 15m

$484

DublinChicago

DUB - ORD

DUBORD

Dublin

mar. 9/16

11:35 am-1:35 pm

Nonstop8h 00m

Chicago O'Hare Intl

sáb. 9/27

8:20 pm-9:45 am

Nonstop7h 25m

$486

ShannonChicago

SNN - ORD

SNNORD

Shannon

dom. 8/31

9:30 am-11:45 am

Nonstop8h 15m

Chicago O'Hare Intl

sáb. 9/6

7:00 am-10:15 am

2 stops21h 15m

$486

DublinChicago

DUB - ORD

DUBORD

Dublin

mar. 9/16

1:45 pm-3:45 pm

Nonstop8h 00m

Chicago O'Hare Intl

lun. 9/29

10:15 pm-11:40 am

Nonstop7h 25m

$487

DublinChicago

DUB - MDW

DUBMDW

Dublin

sáb. 9/6

12:00 pm-5:37 pm

1 stop11h 37m

Chicago Midway

lun. 9/15

6:15 pm-10:00 am

1 stop9h 45m

$487

DublinChicago

DUB - ORD

DUBORD

Dublin

lun. 9/1

12:45 pm-1:50 pm

1 stop31h 05m

Chicago O'Hare Intl

lun. 9/8

10:15 pm-11:40 am

Nonstop7h 25m

$488

DublinChicago

DUB - ORD

DUBORD

Dublin

jue. 9/4

11:35 am-1:35 pm

Nonstop8h 00m

Chicago O'Hare Intl

vie. 9/12

11:40 am-7:10 am

1 stop13h 30m

$490

DublinChicago

DUB - ORD

DUBORD

Dublin

mié. 10/29

11:30 am-6:45 pm

2 stops36h 15m

Chicago O'Hare Intl

dom. 11/2

7:20 pm-7:35 pm

2 stops18h 15m

$494

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 58 results
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Best time to book a flight from Ireland to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Ireland 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 Ireland to Illinois

What is the cheapest month to book a flight from Ireland to Illinois?

Currently, August is the cheapest month in which you can book a flight from Ireland to Illinois (average of $245). Flying from Ireland to Illinois in March is currently the most expensive (average of $321). 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 IE to IL?

Find hourly flight availability from Ireland to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 30, 2025.

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

Weekly flight availability from Ireland to Illinois

Explore weekly flight availability from Ireland to Illinois. 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 julio 30, 2025.

The most flights from IE0 to USIL are scheduled on a Monday (18 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (17 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated julio 30, 2025.
Peruse reviews from past customers who have flown with Delta, Alaska Airlines, and KLM from Ireland to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

Related info for your journey

Find useful and relevant information for your journey from Ireland to Illinois. 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 Ireland to Illinois one-way?

    For one-way options, check prices for Aer Lingus. According to our data, you can fly for as low as $444. Users have also found prices from $504 and $567 on WestJet and Icelandair, respectively.

  • Can I find deals for flights from Ireland to Illinois that include hotel bookings?

    Yes. In addition to deals on Ireland to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ireland to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Illinois.

  • Can I find deals for business class flights from Ireland to Illinois?

    Yes. Cheapflights offers flight deals from Ireland to Illinois 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 Ireland to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Ireland to Illinois (average of $245). Flying from Ireland to Illinois in March is currently the most expensive (average of $321). 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 Ireland to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Ireland to Illinois

Discover the top 2 airlines that operate flights from Ireland to Illinois. 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 julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$447Average$582FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$667Average$757FlexibilityNo cancel feeOn-time69%

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