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$409+ 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
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Trip.com deal was found by Cheapflights users on 12/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2710:10 amDUB - ORD
1 stop12h 35mScandinavian Airlines
Sun 1/187:10 pmORD - DUB
1 stop17h 10mScandinavian Airlines
Deal found 12/15$594
This American Airlines deal was found by Cheapflights users on 12/15. 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.
Fri 12/2611:30 amDUB - ORD
1 stop12h 00mAmerican Airlines
Sat 1/173:21 pmORD - DUB
2 stops15h 24mAmerican Airlines
Deal found 12/15$604
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:10 amDUB - ORD
1 stop12h 35mScandinavian Airlines
Mon 1/197:20 pmORD - DUB
1 stop34h 25mScandinavian Airlines
Deal found 12/15$605
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2710:10 amDUB - ORD
1 stop12h 35mScandinavian Airlines
Mon 1/197:20 pmORD - DUB
1 stop34h 25mScandinavian Airlines
Deal found 12/15$606
This Scandinavian Airlines deal was found by Cheapflights users on 12/15. 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.
Sun 12/2810:10 amDUB - ORD
1 stop12h 35mScandinavian Airlines
Sat 1/177:20 pmORD - DUB
1 stop34h 25mScandinavian Airlines
Deal found 12/15$621
This American Airlines deal was found by Cheapflights users on 12/16. 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.
Fri 12/2610:45 amDUB - ORD
1 stop12h 15mAmerican Airlines
Thu 1/15:21 amORD - DUB
1 stop19h 49mAmerican Airlines
Deal found 12/16$623
This Scandinavian Airlines deal was found by Cheapflights users on 12/15. 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.
Sat 12/2710:10 amDUB - ORD
1 stop12h 35mScandinavian Airlines
Sat 1/177:20 pmORD - DUB
2 stops34h 25mScandinavian Airlines
Deal found 12/15$625
This British Airways deal was found by Cheapflights users on 12/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:45 amDUB - ORD
1 stop12h 40mBritish Airways
Thu 2/58:45 pmORD - DUB
1 stop10h 50mBritish Airways
Deal found 12/16$633
This Flysmarter deal was found by Cheapflights users on 12/16. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:40 amDUB - ORD
1 stop14h 45mBritish Airways
Sat 1/101:55 pmORD - DUB
2 stops16h 50mBritish Airways
Deal found 12/16$634
This Finnair deal was found by Cheapflights users on 12/16. 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.
Fri 12/2611:30 amDUB - ORD
1 stop12h 00mMultiple Airlines
Thu 1/11:15 pmORD - DUB
1 stop11h 55mMultiple Airlines
Deal found 12/16$639
This Delta deal was found by Cheapflights users on 12/15. 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.
Wed 12/249:45 amDUB - MDW
1 stop18h 37mDelta
Thu 2/59:33 amMDW - DUB
2 stops17h 12mDelta
Deal found 12/15$662
This KLM deal was found by Cheapflights users on 12/15. 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 12/239:45 amDUB - MDW
1 stop13h 34mKLM
Fri 2/61:26 pmMDW - DUB
2 stops12h 39mKLM
Deal found 12/15$664

Find flight deals from Ireland to Illinois

Keep the following information in mind while searching for Ireland to Illinois flight deals. Data was last updated December 18, 2025.

Round-trip from

$474
(Booking.com)

One-way from

$409
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$545

Good round-trip deal

$606 or less

Good one-way deal

$477 or less
From Ireland to Illinois
Search Deals
One-way flight from Ireland to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($101 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ireland to Illinois.
Search Deals
Price to beat on a one-way flight from Ireland to Illinois.
Search Deals

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 December 18, 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

Mon 2/2

11:30 am-5:20 pm

1 stop11h 50m

Chicago O'Hare Intl

Tue 2/10

6:30 pm-10:15 am

1 stop9h 45m

$514

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 2/3

11:30 am-5:20 pm

1 stop11h 50m

Chicago O'Hare Intl

Tue 2/10

6:30 pm-10:15 am

1 stop9h 45m

$541

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 2/3

11:30 am-4:45 pm

2 stops35h 15m

Chicago O'Hare Intl

Tue 2/10

7:00 am-11:45 am

2 stops22h 45m

$558

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 1/16

11:30 am-4:45 pm

2 stops35h 15m

Chicago O'Hare Intl

Thu 1/22

7:20 pm-6:20 pm

1 stop17h 00m

$570

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 3/24

11:30 am-6:20 pm

1 stop11h 50m

Chicago O'Hare Intl

Sat 4/4

7:25 pm-11:05 am

1 stop9h 40m

$577

DublinChicago

DUB - ORD

DUBORD

Dublin

Mon 2/2

8:50 am-2:20 pm

1 stop11h 30m

Chicago O'Hare Intl

Tue 2/10

10:29 am-7:50 am

2 stops15h 21m

$579

CorkChicago

ORK - ORD

ORKORD

Cork

Sat 1/17

6:00 am-2:20 pm

1 stop14h 20m

Chicago O'Hare Intl

Thu 1/22

5:20 pm-2:45 pm

1 stop15h 25m

$582

CorkChicago

ORK - ORD

ORKORD

Cork

Sat 1/31

8:10 pm-3:25 pm

1 stop25h 15m

Chicago O'Hare Intl

Sat 2/7

6:25 pm-11:10 am

1 stop10h 45m

$582

CorkChicago

ORK - ORD

ORKORD

Cork

Sat 1/17

6:00 am-2:20 pm

1 stop14h 20m

Chicago O'Hare Intl

Thu 1/22

5:35 pm-2:45 pm

2 stops15h 10m

$582

CorkChicago

ORK - ORD

ORKORD

Cork

Fri 1/16

6:00 am-2:20 pm

1 stop14h 20m

Chicago O'Hare Intl

Thu 1/22

5:20 pm-2:45 pm

1 stop15h 25m

$582

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 60 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 $385). Flying from Ireland to Illinois in July is currently the most expensive (average of $636). 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 December 18, 2025.

It’s typically best to fly out from Ireland to Illinois in the evening. Doing so could potentially save you 26% on the flight price compared to flying in the morning, which is usually more expensive.

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 December 18, 2025.

The most flights from IE0 to USIL are scheduled on a Monday (13 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (11 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 December 18, 2025.
Peruse reviews from past customers who have flown with United Airlines, Aer Lingus, and Icelandair 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
9,091 reviews

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
United Airlines
7.4
Good
9,091 reviews
United Airlines
7.4
Good
9,091 reviews

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
Aer Lingus
7.2
Good
1,395 reviews
United Airlines
7.4
Good
9,091 reviews

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
Icelandair
7.0
Good
591 reviews
United Airlines
7.4
Good
9,091 reviews

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
Lufthansa
6.8
Okay
7,634 reviews
United Airlines
7.4
Good
9,091 reviews

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability

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 KLM 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 Icelandair. According to our data, you can fly for as low as $320. Users have also found prices from $418 and $426 on Aer Lingus and Brussels Airlines, 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 $385). Flying from Ireland to Illinois in July is currently the most expensive (average of $636). 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 4 airlines flying from Ireland to Illinois

Discover the top 4 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$388Average$585FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$411Average$543FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$455Average$636FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$479Average$680FlexibilityNo cancel feeOn-time69%

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