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$347+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ORD
Dec 27 — Jan 31
Fri 12/27
Fri 1/3
1 adult, Economy
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Cheap flight deals from Ireland to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Ireland (IE0) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 22, 2024.

Round-trip from

$426
(Icelandair)

One-way from

$347
(Kiwi.com)
From Ireland to Illinois
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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 December 22, 2024.

This British Airways deal was found by Cheapflights users on 12/20. 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.
Sun 12/228:30 pmDUB - ORD
1 stop24h 15mBritish Airways
Sun 12/296:25 pmORD - DUB
1 stop31h 30mBritish Airways
Deal found 12/20$682
This Delta deal was found by Cheapflights users on 12/21. 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.
Thu 12/2611:30 amDUB - ORD
1 stop13h 18mDelta
Sun 1/57:00 amORD - DUB
1 stop19h 45mDelta
Deal found 12/21$687
This British Airways deal was found by Cheapflights users on 12/21. 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.
Sun 12/226:50 pmDUB - ORD
1 stop25h 40mMultiple Airlines
Sat 1/119:45 pmORD - DUB
1 stop11h 15mMultiple Airlines
Deal found 12/21$705
This United Airlines deal was found by Cheapflights users on 12/21. 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.
Fri 12/279:00 amDUB - ORD
1 stop13h 41mUnited Airlines
Sat 1/49:05 pmORD - DUB
1 stop31h 00mUnited Airlines
Deal found 12/21$718
This Iberia deal was found by Cheapflights users on 12/22. 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.
Sun 12/226:50 pmDUB - ORD
1 stop25h 40mIberia
Thu 12/262:53 pmORD - DUB
1 stop11h 47mIberia
Deal found 12/22$720
This Gotogate deal was found by Cheapflights users on 12/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/229:00 amDUB - ORD
1 stop29h 57mAir Canada
Sun 12/295:59 pmORD - DUB
2 stops55h 11mAir Canada
Deal found 12/20$726
This KLM deal was found by Cheapflights users on 12/21. 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 12/308:50 amDUB - ORD
1 stop11h 40mKLM
Thu 1/165:20 pmORD - DUB
2 stops13h 20mKLM
Deal found 12/21$758
This KLM deal was found by Cheapflights users on 12/21. 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.
Sun 12/221:25 pmORK - ORD
1 stop31h 05mKLM
Sat 12/284:25 pmORD - ORK
1 stop14h 30mKLM
Deal found 12/21$781
This TravelUp deal was found by Cheapflights users on 12/21. 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.
Sun 12/225:35 pmORK - ORD
1 stop26h 20mMultiple Airlines
Sat 12/2812:15 pmORD - ORK
2 stops16h 55mMultiple Airlines
Deal found 12/21$785
This Delta deal was found by Cheapflights users on 12/20. 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.
Sun 12/2211:30 amDUB - MDW
1 stop16h 36mDelta
Sun 12/299:30 amMDW - DUB
2 stops16h 35mDelta
Deal found 12/20$805
This TravelUp deal was found by Cheapflights users on 12/21. 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.
Sun 12/225:35 pmORK - ORD
2 stops32h 10mBritish Airways
Sat 12/2812:15 pmORD - ORK
2 stops16h 55mBritish Airways
Deal found 12/21$806
This Lufthansa deal was found by Cheapflights users on 12/21. 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.
Sat 12/216:00 pmDUB - ORD
2 stops25h 25mLufthansa
Wed 12/256:00 pmORD - DUB
1 stop17h 15mLufthansa
Deal found 12/21$853

Find flights from Ireland to Illinois within your budget

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 22, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 3/25

11:30 am-6:20 pm

1 stop11h 50m

Chicago O'Hare Intl

Wed 4/2

7:30 pm-11:05 am

1 stop9h 35m

$426

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 3/23

10:10 am-6:50 pm

1 stop13h 40m

Chicago O'Hare Intl

Sun 4/6

7:15 pm-6:15 pm

1 stop17h 00m

$433

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 2/4

5:25 pm-2:30 pm

1 stop27h 05m

Chicago O'Hare Intl

Tue 2/11

10:05 am-8:05 am

2 stops16h 00m

$451

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 2/5

8:40 am-2:45 pm

1 stop12h 05m

Chicago O'Hare Intl

Wed 2/12

4:30 pm-7:40 pm

2 stops21h 10m

$455

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 1/16

4:25 am-3:30 pm

1 stop17h 05m

Chicago O'Hare Intl

Fri 1/24

8:20 pm-4:10 pm

1 stop13h 50m

$457

DublinChicago

DUB - MDW

DUBMDW

Dublin

Fri 2/21

8:50 am-6:11 pm

2 stops15h 21m

Chicago Midway

Mon 2/24

5:05 pm-9:45 am

1 stop10h 40m

$460

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 2/4

5:55 am-4:13 pm

2 stops16h 18m

Chicago O'Hare Intl

Tue 2/11

4:15 pm-12:40 pm

2 stops14h 25m

$464

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 2/21

6:00 am-2:30 pm

2 stops14h 30m

Chicago O'Hare Intl

Mon 2/24

5:20 pm-3:40 pm

1 stop16h 20m

$467

DublinChicago

DUB - ORD

DUBORD

Dublin

Mon 1/13

2:05 pm-8:04 pm

1 stop11h 59m

Chicago O'Hare Intl

Sun 1/19

2:52 pm-8:40 am

1 stop11h 48m

$478

DublinChicago

DUB - ORD

DUBORD

Dublin

Mon 1/13

5:55 am-2:30 pm

1 stop14h 35m

Chicago O'Hare Intl

Sun 1/19

7:14 am-8:45 am

1 stop19h 31m

$480

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 57 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.

Travel insights for flights from Ireland to Illinois

Get recent, data-driven insights about flights from Ireland to Illinois including ideal travel times, pricing trends, and more.

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 $317). 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 22, 2024.

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.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 22, 2024.
To help decide which airline to fly from Ireland to Illinois, see what other customers have to say about British Airways, TAP AIR PORTUGAL and KLM. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,594 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,594 reviews
Delta
8.0
Very good
8,594 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,342 reviews
Delta
8.0
Very good
8,594 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.7
Good
1,283 reviews
Delta
8.0
Very good
8,594 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS
7.6
Good
1,605 reviews
Delta
8.0
Very good
8,594 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France
7.4
Good
1,501 reviews
Delta
8.0
Very good
8,594 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Overall

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 TAP AIR PORTUGAL. According to our data, you can fly for as low as $427. Users have also found prices from $432 and $435 on Icelandair and Aer Lingus, 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 $317). 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 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 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$368Average$653FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$373Average$517FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$399Average$540FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$549Average$750FlexibilityNo cancel feeOn-time69%
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