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Illinois

$435+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ORD
nov. 29 — déc. 61
sam. 11/29
sam. 12/6
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 octobre 30, 2025.

Round-trip from

$452
(Icelandair)

One-way from

$435
(Cheapflightsfares)

Popular in

July

Cheapest in

September

Average price

$604

Good round-trip deal

$602 or less

Good one-way deal

$519 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 ($102 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in October 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 octobre 30, 2025.

This Icelandair deal was found by Cheapflights users on 10/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/2411:30 amDUB - ORD
1 stop11h 50mIcelandair
ven. 11/286:30 pmORD - DUB
1 stop9h 45mIcelandair
Deal found 10/29$452
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 11/207:05 pmDUB - ORD
1 stop27h 40mScandinavian Airlines
jeu. 11/277:20 pmORD - DUB
2 stops16h 50mScandinavian Airlines
Deal found 10/28$456
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 11/138:50 amDUB - ORD
1 stop14h 10mMultiple Airlines
dim. 11/168:40 pmORD - DUB
1 stop11h 40mMultiple Airlines
Deal found 10/30$458
This lol.travel deal was found by Cheapflights users on 10/29. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 11/1212:30 pmDUB - ORD
1 stop34h 15mScandinavian Airlines
dim. 11/167:20 pmORD - DUB
2 stops18h 15mScandinavian Airlines
Deal found 10/29$459
This American Airlines deal was found by Cheapflights users on 10/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 11/63:55 pmDUB - ORD
1 stop29h 30mAmerican Airlines
ven. 11/146:30 pmORD - DUB
1 stop14h 35mAmerican Airlines
Deal found 10/30$461
This Booking.com deal was found by Cheapflights users on 10/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/2210:10 amDUB - ORD
1 stop12h 35mScandinavian Airlines
ven. 11/287:20 pmORD - DUB
1 stop32h 05mScandinavian Airlines
Deal found 10/29$462
This SmartFares deal was found by Cheapflights users on 10/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/810:10 amDUB - ORD
1 stop12h 35mScandinavian Airlines
lun. 11/177:20 pmORD - DUB
1 stop17h 00mScandinavian Airlines
Deal found 10/29$463
This SmartFares deal was found by Cheapflights users on 10/28. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 12/65:10 amDUB - ORD
1 stop14h 00mLufthansa
dim. 12/286:35 pmORD - DUB
Nonstop7h 35mLufthansa
Deal found 10/28$464
This American Airlines deal was found by Cheapflights users on 10/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 11/711:30 amDUB - ORD
1 stop12h 14mAmerican Airlines
ven. 11/148:40 pmORD - DUB
1 stop12h 25mAmerican Airlines
Deal found 10/30$468
This American Airlines deal was found by Cheapflights users on 10/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 11/2211:30 amDUB - ORD
1 stop12h 14mAmerican Airlines
ven. 11/282:50 pmORD - DUB
2 stops18h 15mAmerican Airlines
Deal found 10/29$469
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 11/75:55 amDUB - ORD
1 stop14h 25mDelta
jeu. 11/1310:40 amORD - DUB
2 stops15h 20mDelta
Deal found 10/30$470
This Delta deal was found by Cheapflights users on 10/29. 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.
mer. 11/265:55 amDUB - ORD
1 stop14h 25mDelta
mer. 12/35:20 pmORD - DUB
1 stop16h 25mDelta
Deal found 10/29$471

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 octobre 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

jeu. 12/11

11:30 am-5:20 pm

1 stop11h 50m

Chicago O'Hare Intl

lun. 12/15

6:30 pm-10:15 am

1 stop9h 45m

$451

DublinChicago

DUB - ORD

DUBORD

Dublin

jeu. 12/11

11:30 am-5:20 pm

1 stop11h 50m

Chicago O'Hare Intl

mer. 12/17

6:30 pm-10:15 am

1 stop9h 45m

$451

DublinChicago

DUB - ORD

DUBORD

Dublin

mer. 2/25

12:30 pm-4:45 pm

1 stop34h 15m

Chicago O'Hare Intl

dim. 3/1

7:20 pm-7:35 pm

2 stops18h 15m

$458

DublinChicago

DUB - ORD

DUBORD

Dublin

mer. 12/24

5:55 am-2:20 pm

1 stop14h 25m

Chicago O'Hare Intl

sam. 1/10

7:00 am-8:05 am

2 stops19h 05m

$463

DublinChicago

DUB - ORD

DUBORD

Dublin

dim. 2/22

9:00 am-3:10 pm

1 stop12h 10m

Chicago O'Hare Intl

mer. 3/4

6:35 pm-8:10 am

Nonstop7h 35m

$465

DublinChicago

DUB - ORD

DUBORD

Dublin

ven. 12/5

9:00 am-3:10 pm

1 stop12h 10m

Chicago O'Hare Intl

lun. 12/15

6:35 pm-8:10 am

Nonstop7h 35m

$465

DublinChicago

DUB - ORD

DUBORD

Dublin

mer. 12/10

8:50 am-9:39 pm

2 stops18h 49m

Chicago O'Hare Intl

dim. 2/1

2:24 pm-12:40 pm

2 stops16h 16m

$468

DublinChicago

DUB - ORD

DUBORD

Dublin

lun. 12/8

9:00 am-5:48 pm

1 stop14h 48m

Chicago O'Hare Intl

mer. 2/4

3:35 pm-7:30 am

1 stop9h 55m

$469

DublinChicago

DUB - ORD

DUBORD

Dublin

dim. 2/22

6:00 am-3:10 pm

1 stop15h 10m

Chicago O'Hare Intl

mer. 3/4

10:40 am-8:05 am

2 stops15h 25m

$469

DublinChicago

DUB - ORD

DUBORD

Dublin

dim. 12/14

9:00 am-3:10 pm

1 stop12h 10m

Chicago O'Hare Intl

sam. 1/31

1:00 pm-7:30 am

1 stop12h 30m

$469

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 53 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, February is the cheapest month in which you can book a flight from Ireland to Illinois (average of $392). Flying from Ireland to Illinois in July is currently the most expensive (average of $622). 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 octobre 30, 2025.

It’s typically best to fly out from Ireland to Illinois in the evening. Doing so could potentially save you 28% on the flight price compared to flying at noon, which is usually more expensive.

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 octobre 30, 2025.
Peruse reviews from past customers who have flown with United Airlines, Aer Lingus, and Lufthansa 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.
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Aer Lingus
7.2
Good
1,363 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Lufthansa
6.8
Okay
7,541 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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.

  • How long is the flight from Ireland to Illinois?

    There are many flights that can get you from Ireland to Illinois in 11h 50m. Fly via Icelandair, Scandinavian Airlines, or Delta to get the fastest option. Airlines will cover a distance of 3661 mi. This flight may include one or multiple stops.

  • 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 $435. Users have also found prices from $437 and $621 on British Airways and Delta, 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, February is the cheapest month in which you can book a flight from Ireland to Illinois (average of $392). Flying from Ireland to Illinois in July is currently the most expensive (average of $622). 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 3 airlines flying from Ireland to Illinois

Discover the top 3 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 octobre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$393Average$514FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$455Average$630FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$479Average$696FlexibilityNo cancel feeOn-time69%

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