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$361+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ORD
feb. 4 — feb. 111
mar. 2/4
mar. 2/11
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 enero 30, 2025.

Round-trip from

$405
(Trip.com)

Popular in

July

Cheapest in

November

Average price

$552

Good round-trip deal

$559 or less

Good one-way deal

$435 or less
From Ireland to Illinois
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Highest demand for flights based on searches. 18% potential increase in price ($126 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in January 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 enero 30, 2025.

This Trip.com deal was found by Cheapflights users on 1/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 3/110:20 amDUB - ORD
1 stop13h 30mScandinavian Airlines
dom. 3/98:55 pmORD - DUB
1 stop16h 25mScandinavian Airlines
Deal found 1/29$405
This Finnair deal was found by Cheapflights users on 1/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/51:45 pmDUB - ORD
Nonstop8h 00mMultiple Airlines
lun. 9/158:40 pmORD - DUB
1 stop12h 00mMultiple Airlines
Deal found 1/29$413
This Booking.com deal was found by Cheapflights users on 1/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/108:40 amDUB - ORD
1 stop12h 05mBritish Airways
lun. 2/175:00 pmORD - DUB
1 stop10h 50mBritish Airways
Deal found 1/28$425
This Mytrip deal was found by Cheapflights users on 1/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/611:30 amDUB - ORD
1 stop11h 50mIcelandair
lun. 3/107:30 pmORD - DUB
1 stop9h 45mIcelandair
Deal found 1/29$426
This Finnair deal was found by Cheapflights users on 1/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/91:45 pmDUB - ORD
Nonstop8h 00mFinnair
lun. 9/1510:20 pmORD - DUB
Nonstop7h 20mFinnair
Deal found 1/29$428
This American Airlines deal was found by Cheapflights users on 1/29. 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.
vie. 3/282:05 pmDUB - ORD
1 stop13h 42mAmerican Airlines
sáb. 4/54:55 pmORD - DUB
1 stop10h 40mAmerican Airlines
Deal found 1/29$429
This TravelUp deal was found by Cheapflights users on 1/29. 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.
vie. 2/285:55 amDUB - ORD
1 stop14h 35mKLM
dom. 3/95:25 pmORD - DUB
1 stop18h 15mKLM
Deal found 1/29$457
This Travelocity deal was found by Cheapflights users on 1/28. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/1810:55 amDUB - ORD
1 stop33h 35mIberia
mar. 2/255:18 pmORD - DUB
1 stop9h 22mIberia
Deal found 1/28$458
This oojo deal was found by Cheapflights users on 1/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/14:55 pmDUB - ORD
1 stop28h 35mTAP AIR PORTUGAL
mié. 2/197:15 pmORD - DUB
1 stop22h 05mTAP AIR PORTUGAL
Deal found 1/29$470
This Delta deal was found by Cheapflights users on 1/29. 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.
mié. 3/55:55 amDUB - ORD
1 stop14h 35mDelta
mar. 3/116:20 pmORD - DUB
1 stop16h 20mDelta
Deal found 1/29$478
This Delta deal was found by Cheapflights users on 1/30. 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.
jue. 3/65:55 amDUB - MDW
2 stops18h 16mDelta
lun. 3/106:42 pmMDW - DUB
2 stops15h 58mDelta
Deal found 1/30$484
This KLM deal was found by Cheapflights users on 1/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/176:00 amORK - ORD
1 stop14h 30mKLM
lun. 2/244:25 pmORD - ORK
1 stop14h 30mKLM
Deal found 1/30$487

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 enero 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

DublinChicago

DUB - ORD

DUBORD

Dublin

sáb. 3/1

10:20 am-5:50 pm

1 stop13h 30m

Chicago O'Hare Intl

dom. 3/9

8:55 pm-6:20 pm

1 stop16h 25m

$405

DublinChicago

DUB - ORD

DUBORD

Dublin

lun. 2/10

8:40 am-2:45 pm

1 stop12h 05m

Chicago O'Hare Intl

lun. 2/17

5:00 pm-9:50 am

1 stop10h 50m

$425

DublinChicago

DUB - ORD

DUBORD

Dublin

jue. 3/6

11:30 am-5:20 pm

1 stop11h 50m

Chicago O'Hare Intl

lun. 3/10

7:30 pm-10:15 am

1 stop9h 45m

$426

DublinChicago

DUB - ORD

DUBORD

Dublin

vie. 3/28

2:05 pm-10:47 pm

1 stop13h 42m

Chicago O'Hare Intl

sáb. 4/5

4:55 pm-9:35 am

1 stop10h 40m

$429

DublinChicago

DUB - ORD

DUBORD

Dublin

mar. 2/11

10:55 am-6:45 pm

1 stop13h 50m

Chicago O'Hare Intl

mar. 2/18

2:55 pm-8:40 am

1 stop11h 45m

$434

DublinChicago

DUB - ORD

DUBORD

Dublin

vie. 2/28

5:55 am-2:30 pm

1 stop14h 35m

Chicago O'Hare Intl

dom. 3/9

5:25 pm-4:40 pm

1 stop18h 15m

$457

DublinChicago

DUB - ORD

DUBORD

Dublin

mar. 2/18

10:55 am-2:30 pm

1 stop33h 35m

Chicago O'Hare Intl

mar. 2/25

5:18 pm-8:40 am

1 stop9h 22m

$458

DublinChicago

DUB - ORD

DUBORD

Dublin

mié. 3/5

5:55 am-2:30 pm

1 stop14h 35m

Chicago O'Hare Intl

mar. 3/11

5:00 pm-3:40 pm

2 stops17h 40m

$478

DublinChicago

DUB - MDW

DUBMDW

Dublin

jue. 3/6

5:55 am-6:11 pm

2 stops18h 16m

Chicago Midway

lun. 3/10

6:42 pm-3:40 pm

2 stops15h 58m

$484

CorkChicago

ORK - ORD

ORKORD

Cork

lun. 2/17

6:00 am-2:30 pm

1 stop14h 30m

Chicago O'Hare Intl

lun. 2/24

4:25 pm-12:55 pm

1 stop14h 30m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

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.

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 $325). 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 enero 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 enero 30, 2025.

The most flights from IE0 to USIL are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

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 enero 30, 2025.
To help decide which airline to fly from Ireland to Illinois, see what other customers have to say about Delta, KLM and Finnair. 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
8,454 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

Delta
8.0
Very good
8,454 reviews
Delta
8.0
Very good
8,454 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

KLM
7.8
Good
1,335 reviews
Delta
8.0
Very good
8,454 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

Finnair
7.6
Good
1,285 reviews
Delta
8.0
Very good
8,454 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

SWISS
7.5
Good
1,584 reviews
Delta
8.0
Very good
8,454 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

Air France
7.4
Good
1,475 reviews
Delta
8.0
Very good
8,454 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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 Aer Lingus. According to our data, you can fly for as low as $420. Users have also found prices from $421 and $423 on Icelandair and TAP AIR PORTUGAL, 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 $325). 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 enero 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$368Average$795FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$399Average$558FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$412Average$525FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$549Average$750FlexibilityNo cancel feeOn-time69%
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