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Cheap flights from Ireland to Chicago from £331

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 18/3. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — CHI
21 Jan — 28 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ireland to Chicago

Enter your travel dates to find the best prices.

Cheapest flights from Ireland to Chicago
Explore the most affordable flight options available from Ireland to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 December 2025.

Fri 26/1211:30DUB - ORD
1 stop12h 00mAmerican Airlines
Wed 31/1217:34ORD - DUB
1 stop9h 06mAmerican Airlines
Deal found 22/12£387
Fri 26/1211:30DUB - ORD
1 stop15h 07mAmerican Airlines
Tue 6/117:26ORD - DUB
1 stop9h 14mAmerican Airlines
Deal found 22/12£407
Wed 24/1211:30DUB - ORD
1 stop11h 49mAmerican Airlines
Tue 6/117:26ORD - DUB
1 stop9h 14mAmerican Airlines
Deal found 22/12£472
Wed 24/1210:20DUB - ORD
1 stop14h 25mBritish Airways
Wed 31/1217:10ORD - DUB
1 stop10h 30mBritish Airways
Deal found 22/12£509
Fri 26/1210:40DUB - ORD
Nonstop8h 50mUnited Airlines
Mon 5/114:37ORD - DUB
1 stop10h 53mUnited Airlines
Deal found 22/12£524
Tue 23/1207:35DUB - ORD
1 stop13h 50mBritish Airways
Thu 8/118:25ORD - DUB
1 stop10h 50mBritish Airways
Deal found 19/12£525
Fri 26/1211:30DUB - ORD
Nonstop8h 30mAer Lingus
Tue 6/121:00ORD - DUB
Nonstop7h 20mAer Lingus
Deal found 22/12£541
Tue 23/1210:40DUB - ORD
Nonstop8h 50mUnited Airlines
Sat 3/118:21ORD - DUB
1 stop9h 59mUnited Airlines
Deal found 22/12£543
Wed 24/1213:35DUB - ORD
1 stop13h 40mUnited Airlines
Thu 1/114:37ORD - DUB
1 stop10h 53mUnited Airlines
Deal found 22/12£546
Wed 24/1208:45DUB - ORD
1 stop12h 40mBritish Airways
Thu 5/220:45ORD - DUB
1 stop10h 50mBritish Airways
Deal found 22/12£552
Fri 26/1211:30DUB - ORD
Nonstop8h 30mAer Lingus
Sun 4/119:40ORD - DUB
Nonstop7h 20mAer Lingus
Deal found 22/12£554
Tue 23/1209:45DUB - MDW
1 stop13h 34mDelta
Wed 31/1215:29MDW - DUB
1 stop10h 16mDelta
Deal found 22/12£557

Find flight deals from Ireland to Chicago

Keep the following information in mind while searching for Ireland to Chicago flight deals. Data was last updated 22 December 2025.

Round-trip from

£354

One-way from

£331

Popular in

July

Cheapest in

September

Average price

£410

Good round-trip deal

£472 or less

Good one-way deal

£372 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 15/1-22/1
  • 2 total stops
  • 51h 15m total
  • Ireland to Chicago
Search Deals
Aer Lingus
  • Aer Lingus
  • 18/3
  • 1 total stop
  • 18h 05m total
  • Ireland to Chicago
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ireland to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from Ireland to Chicago (CHI).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ireland to Chicago 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 858,174 searches. Data last updated 22 December 2025.
Use the filters below to find and compare flights from Ireland to Chicago that are best for you.

Fly from

Ireland

Fly to

Chicago

Route

Depart

Return

Price

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 4/2

19:05-16:45

1 stop27h 40m

Chicago O'Hare Intl

Sun 8/2

19:10-18:20

1 stop17h 10m

£358

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 12/2

12:30-16:45

1 stop34h 15m

Chicago O'Hare Intl

Thu 26/2

19:20-18:20

1 stop17h 00m

£358

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 15/1

11:30-16:45

2 stops35h 15m

Chicago O'Hare Intl

Thu 22/1

19:20-18:20

1 stop17h 00m

£365

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 1/3

10:10-16:45

1 stop12h 35m

Chicago O'Hare Intl

Wed 11/3

20:20-10:45

2 stops33h 25m

£368

DublinChicago

DUB - MDW

DUBMDW

Dublin

Tue 3/2

05:55-18:36

2 stops18h 41m

Chicago Midway

Tue 10/2

13:26-15:45

2 stops20h 19m

£398

DublinChicago

DUB - MDW

DUBMDW

Dublin

Thu 15/1

05:55-17:34

2 stops17h 39m

Chicago Midway

Thu 22/1

18:35-15:45

2 stops15h 10m

£398

DublinChicago

DUB - MDW

DUBMDW

Dublin

Fri 16/1

05:55-17:37

2 stops17h 42m

Chicago Midway

Thu 22/1

18:35-15:45

2 stops15h 10m

£398

DublinChicago

DUB - MDW

DUBMDW

Dublin

Tue 3/2

08:50-17:55

2 stops15h 05m

Chicago Midway

Tue 10/2

18:35-15:45

2 stops15h 10m

£399

DublinChicago

DUB - MDW

DUBMDW

Dublin

Sun 18/1

05:55-18:32

2 stops18h 37m

Chicago Midway

Sun 25/1

13:26-08:45

2 stops13h 19m

£400

DublinChicago

DUB - MDW

DUBMDW

Dublin

Thu 12/2

05:55-17:37

2 stops17h 42m

Chicago Midway

Thu 26/2

12:46-07:45

1 stop12h 59m

£401

Flights are sorted by cheapest return flights first.

Deals found on 19/12

Showing 1-10 of 24 results
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Best time to book a flight from Ireland to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Ireland with our price prediction graph.
Estimated return 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 Chicago

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

Currently, February is the cheapest month in which you can book a flight from Ireland to Chicago (average of £291). Flying from Ireland to Chicago in July is currently the most expensive (average of £475). 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 CHI?

Find hourly flight availability from Ireland to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 December 2025.

A simple way to save on the total cost of your ticket is to fly from Ireland to Chicago in the afternoon. If you’re flexible enough to do this you can expect to save up to 21% on your trip compared to booking a flight at midday.

How often are flights from Ireland to Chicago delayed?

About 12% of weekly flights between Ireland and Chicago have experienced delays in the past year, with the average delay time being 140 minutes.

What is the most punctual flight time for Ireland to Chicago flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ireland to Chicago flights?

Over the past year, Aer Lingus have had the lowest number of delays on this route, with just 7% of flights being delayed.

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated 22 December 2025.
Check out reviews from past customers who have flown with United Airlines, Aer Lingus, andBrussels Airlines from Ireland to Chicago to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,105 reviews
Check prices

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,105 reviews
United Airlines
7.4
Good
9,105 reviews
Check prices

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Aer Lingus
7.2
Good
1,410 reviews
United Airlines
7.4
Good
9,105 reviews
Check prices

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Brussels Airlines
7.2
Good
375 reviews
United Airlines
7.4
Good
9,105 reviews
Check prices

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Icelandair
7.0
Good
592 reviews
United Airlines
7.4
Good
9,105 reviews
Check prices

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
British Airways
6.7
Okay
7,605 reviews
United Airlines
7.4
Good
9,105 reviews
Check prices

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

Find useful and relevant information for your journey from Ireland to Chicago. 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 Chicago?

    Departing from Ireland to Chicago will take you 18h 41m. Ireland and Chicago are separated by a distance of 3664 mi. This flight may include one or multiple stops.

  • What are the most reliable airlines from Ireland to Chicago?

    The top 3 most reliable airlines when flying from Ireland to Chicago are Iberia (81%), American Airlines (80%) and British Airways (79%).

  • What are the cheapest flights from Ireland to Chicago?

    The cheapest flight price from Ireland to Chicago is £372. On average you can expect to pay £481. The most popular route, (Dublin - Chicago O'Hare Intl), can usually be booked for £317.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Ireland to Chicago (average of £291). Flying from Ireland to Chicago in July is currently the most expensive (average of £475). 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 Chicago

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to O'Hare Intl flights
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London City to O'Hare Intl flights
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Gatwick to Champaign flights
Newcastle upon Tyne to St. Louis flights
Newquay to O'Hare Intl flights
Liverpool to O'Hare Intl flights
Prague to O'Hare Intl flights

Top 6 airlines flying from Ireland to Chicago

Discover the top 6 airlines that operate flights from Ireland to Chicago. 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 858,174 searches. Data last updated 22 December 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£242Average£341FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£300Average£437FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£316Average£465FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Aer LingusCheapest£345Average£499FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£355Average£624FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£455Average£494FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ireland to Chicago?

Cheapflights helps you search for flights from Ireland to Chicago via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Ireland to Chicago?

Cheapflights simply makes it quick and affordable to book flights from Ireland to Chicago by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ireland to Chicago with no change fees?

Yes, we can. To see specific flights from Ireland to Chicago with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ireland to Chicago become cheaper?

Not ready to book yet? You can track prices for flights from Ireland to Chicago on Cheapflights with our Price Alert feature and get notified when better prices are available.

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