HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chicago

$321+ Cheap flights from Ireland to Chicago (CHI)

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — CHI
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ireland to Chicago with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ireland to Chicago

Keep the following information in mind while searching for Ireland to Chicago flight deals. Data was last updated July 30, 2025.

Round-trip from

$482
(Delta)

One-way from

$321
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$750

Good round-trip deal

$740 or less

Good one-way deal

$641 or less
From Ireland to Chicago (CHI)
Search Deals
One-way flight from Ireland to Chicago (CHI)
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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

Find flight deals from Ireland to Chicago

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 July 30, 2025.

This Delta deal was found by Cheapflights users on 7/29. 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.
Mon 9/16:00 amDUB - ORD
2 stops19h 09mDelta
Sun 9/711:05 amORD - DUB
1 stop16h 55mDelta
Deal found 7/29$482
This Delta deal was found by Cheapflights users on 7/29. 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.
Mon 9/112:00 pmDUB - MDW
1 stop11h 37mDelta
Sun 9/710:31 amMDW - DUB
1 stop16h 14mDelta
Deal found 7/29$483
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/149:20 amDUB - ORD
1 stop35h 40mAir Canada
Sat 9/276:20 pmORD - DUB
1 stop31h 55mAir Canada
Deal found 7/29$484
This Lufthansa deal was found by Cheapflights users on 7/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1611:35 amDUB - ORD
Nonstop8h 00mLufthansa
Wed 10/18:20 pmORD - DUB
Nonstop7h 25mLufthansa
Deal found 7/29$486
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/319:30 amSNN - ORD
Nonstop8h 15mUnited Airlines
Sat 9/67:00 amORD - SNN
2 stops21h 15mUnited Airlines
Deal found 7/29$486
This Finnair deal was found by Cheapflights users on 7/28. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/161:45 pmDUB - ORD
Nonstop8h 00mFinnair
Mon 9/2910:15 pmORD - DUB
Nonstop7h 25mFinnair
Deal found 7/28$487
This Air France deal was found by Cheapflights users on 7/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/612:00 pmDUB - MDW
1 stop11h 37mAir France
Mon 9/156:15 pmMDW - DUB
1 stop9h 45mAir France
Deal found 7/28$487
This American Airlines deal was found by Cheapflights users on 7/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/112:45 pmDUB - ORD
1 stop11h 30mAmerican Airlines
Mon 9/88:35 amORD - DUB
1 stop15h 55mAmerican Airlines
Deal found 7/28$488
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:35 amDUB - ORD
Nonstop8h 00mUnited Airlines
Fri 9/1211:40 amORD - DUB
1 stop13h 30mUnited Airlines
Deal found 7/28$490
This Scandinavian Airlines deal was found by Cheapflights users on 7/30. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2911:30 amDUB - ORD
2 stops36h 15mScandinavian Airlines
Sun 11/27:20 pmORD - DUB
2 stops18h 15mScandinavian Airlines
Deal found 7/30$494
This KLM deal was found by Cheapflights users on 7/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1710:00 amDUB - MDW
1 stop13h 35mKLM
Sun 9/281:43 pmMDW - DUB
1 stop12h 12mKLM
Deal found 7/29$495
This TravelUp deal was found by Cheapflights users on 7/29. 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.
Sun 9/79:30 amDUB - ORD
1 stop15h 20mIberia
Sat 9/1310:15 pmORD - DUB
Nonstop7h 25mIberia
Deal found 7/29$498

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated July 30, 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

Mon 9/1

6:00 am-7:09 pm

2 stops19h 09m

Chicago O'Hare Intl

Sun 9/7

11:05 am-10:00 am

1 stop16h 55m

$482

DublinChicago

DUB - MDW

DUBMDW

Dublin

Mon 9/1

12:00 pm-5:37 pm

1 stop11h 37m

Chicago Midway

Sun 9/7

10:31 am-8:45 am

1 stop16h 14m

$483

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 9/14

9:20 am-3:00 pm

1 stop35h 40m

Chicago O'Hare Intl

Tue 9/30

2:00 pm-8:15 am

1 stop12h 15m

$484

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 9/16

11:35 am-1:35 pm

Nonstop8h 00m

Chicago O'Hare Intl

Sat 9/27

8:20 pm-9:45 am

Nonstop7h 25m

$486

ShannonChicago

SNN - ORD

SNNORD

Shannon

Sun 8/31

9:30 am-11:45 am

Nonstop8h 15m

Chicago O'Hare Intl

Sat 9/6

7:00 am-10:15 am

2 stops21h 15m

$486

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 9/16

1:45 pm-3:45 pm

Nonstop8h 00m

Chicago O'Hare Intl

Mon 9/29

10:15 pm-11:40 am

Nonstop7h 25m

$487

DublinChicago

DUB - MDW

DUBMDW

Dublin

Sat 9/6

12:00 pm-5:37 pm

1 stop11h 37m

Chicago Midway

Mon 9/15

6:15 pm-10:00 am

1 stop9h 45m

$487

DublinChicago

DUB - ORD

DUBORD

Dublin

Mon 9/1

12:45 pm-1:50 pm

1 stop31h 05m

Chicago O'Hare Intl

Mon 9/8

10:15 pm-11:40 am

Nonstop7h 25m

$488

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 9/4

11:35 am-1:35 pm

Nonstop8h 00m

Chicago O'Hare Intl

Fri 9/12

11:40 am-7:10 am

1 stop13h 30m

$490

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 10/29

11:30 am-6:45 pm

2 stops36h 15m

Chicago O'Hare Intl

Sun 11/2

7:20 pm-7:35 pm

2 stops18h 15m

$494

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 54 results
1
2
3
...
6

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 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 Chicago

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

Currently, August is the cheapest month in which you can book a flight from Ireland to Chicago (average of $245). Flying from Ireland to Chicago in March is currently the most expensive (average of $321). 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 July 30, 2025.

It’s optimal to fly from Ireland to Chicago in the afternoon. By choosing this option you can save up to 6% on the cost of your flight, compared to a flight at noon.

Weekly flight availability from Ireland to Chicago

Explore weekly flight availability from Ireland to Chicago. 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 July 30, 2025.

The most flights from IE0 to CHI are scheduled on a Monday (18 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (17 on average).

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 July 30, 2025.
Read through reviews of airlines operating flights from Ireland to Chicago, such as Delta, Alaska Airlines, and KLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

  • What are the cheapest airlines to fly from Ireland to Chicago one-way?

    One-way options have recently been found by users for as low as $444 on Aer Lingus. Other airlines that offer cheap prices include Icelandair from $567 and TAP AIR PORTUGAL from $570 one-way.

  • What are the most popular routes from Ireland to Chicago?

    When deciding which route to take from Ireland to Chicago consider Dublin - Chicago O'Hare Intl, Dublin - Chicago Midway or Shannon - Chicago O'Hare Intl as they are the most popular.

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

    Before booking your flight to Chicago from Ireland, check out the most reliable airlines to get you to your destination on time: Aer Lingus (56%), American Airlines (56%), British Airways( 56%).

  • What are the cheapest flights from Ireland to Chicago?

    While on average a flight from Ireland to Chicago is generally $1,515, our data shows the cheapest flight currently is $507. When looking at the most popular route, (Dublin - Chicago O'Hare Intl), you can expect to pay $381 for that flight.

  • 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 vacation 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, August is the cheapest month in which you can book a flight from Ireland to Chicago (average of $245). Flying from Ireland to Chicago in March is currently the most expensive (average of $321). 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

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
Lansing
Hammond
Benton Harbor
Porter
Valparaiso
Chesterton

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ireland to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
Charles de Gaulle to O'Hare Intl flights
Heathrow to O'Hare Intl flights
Frederic Chopin to O'Hare Intl flights
Frankfurt to O'Hare Intl flights
Frederic Chopin to Midway flights
Orly to O'Hare Intl flights
Munich to O'Hare Intl flights
Athens to O'Hare Intl flights
Barcelona-El Prat to O'Hare Intl flights
Amsterdam to O'Hare Intl flights
Gatwick to O'Hare Intl flights
Charles de Gaulle to Midway flights
London City to O'Hare Intl flights
Malpensa to O'Hare Intl flights
Dublin to O'Hare Intl flights
Zurich to O'Hare Intl flights
Vienna to O'Hare Intl flights
Heathrow to Midway flights
Krakow to O'Hare Intl flights
Leonardo da Vinci/Fiumicino to O'Hare Intl flights
Madrid to O'Hare Intl flights
Bruxelles-National to O'Hare Intl flights
Beauvais-Tille to O'Hare Intl flights
Barcelona-El Prat to Midway flights
Istanbul to O'Hare Intl flights
Madrid to Midway flights
Modlin to O'Hare Intl flights
Duesseldorf Intl to O'Hare Intl flights
Stansted to O'Hare Intl flights
Bergamo to O'Hare Intl flights
Amsterdam to Midway flights
Luton to O'Hare Intl flights
Vilnius to O'Hare Intl flights
Munich to Midway flights
Bruxelles-National to Midway flights
Rzeszow to O'Hare Intl flights
Duesseldorf Intl to Midway flights
Manchester to O'Hare Intl flights
Frankfurt to St. Louis flights
Lyon to O'Hare Intl flights
Linate to O'Hare Intl flights
Ciampino to O'Hare Intl flights
Vicenza to O'Hare Intl flights
Berlin to O'Hare Intl flights

Top 2 airlines flying from Ireland to Chicago

Discover the top 2 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 2,558,603 searches. Data last updated July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$447Average$582FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$667Average$757FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.