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Cheap flights from Ireland to Chicago from $398

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to Chicago departing on 10/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ireland to Chicago

Recent round-trip flight deals from Ireland to Chicago

Scandinavian Airlines Logo
7:05 pm - 9:05 pmDUB-ORD
31h 00m1 stop
Scandinavian Airlines Logo
7:20 pm - 11:45 amORD-DUB
34h 25m1 stop
$438Scandinavian Airlines
Find Deal
Tue, Oct 28 - Wed, Nov 5
Scandinavian Airlines Logo
7:05 pm - 5:45 pmDUB-ORD
27h 40m1 stop
Scandinavian Airlines Logo
7:20 pm - 11:45 amORD-DUB
34h 25m1 stop
$439Scandinavian Airlines
Find Deal
Thu, Oct 30 - Wed, Nov 5
British Airways Logo
10:45 am - 5:00 pmDUB-ORD
12h 15m1 stop
British Airways Logo
8:40 pm - 7:40 pmORD-DUB
17h 00m1 stop
$442British Airways
Find Deal
Sun, Nov 2 - Sun, Nov 9
British Airways Logo
8:45 am - 2:40 pmDUB-ORD
11h 55m1 stop
British Airways Logo
5:40 pm - 11:55 amORD-DUB
12h 15m1 stop
$445British Airways
Find Deal
Mon, Oct 13 - Tue, Oct 21
Lufthansa Logo
5:10 am - 8:05 pmDUB-ORD
20h 55m1 stop
Lufthansa Logo
9:50 pm - 5:10 pmORD-DUB
13h 20m1 stop
$449Lufthansa
Find Deal
Wed, Nov 5 - Tue, Nov 11
Aer Lingus Logo
11:30 am - 2:00 pmDUB-ORD
8h 30mnonstop
Aer Lingus Logo
7:40 pm - 9:00 amORD-DUB
7h 20mnonstop
$454Aer Lingus
Find Deal
Mon, Nov 3 - Fri, Nov 7
Lufthansa Logo
5:10 am - 4:20 pmDUB-ORD
16h 10m1 stop
Lufthansa Logo
6:35 pm - 8:10 amORD-DUB
7h 35mnonstop
$455Lufthansa
Find Deal
Sun, Nov 2 - Sun, Nov 9
Aer Lingus Logo
11:35 am - 2:00 pmDUB-ORD
8h 25mnonstop
Aer Lingus Logo
9:15 pm - 10:40 amORD-DUB
7h 25mnonstop
$462Aer Lingus
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Wed, Oct 15 - Wed, Oct 22
United Airlines Logo
9:20 am - 3:00 pmDUB-ORD
35h 40m1 stop
United Airlines Logo
8:15 pm - 7:10 amORD-DUB
28h 55m1 stop
$463United Airlines
Find Deal
Fri, Oct 24 - Mon, Nov 3
United Airlines Logo
9:20 am - 3:00 pmDUB-ORD
35h 40m1 stop
United Airlines Logo
8:20 pm - 9:45 amORD-DUB
7h 25mnonstop
$466United Airlines
Find Deal
Wed, Oct 8 - Mon, Oct 13

Lufthansa flights from Ireland to Chicago O'Hare Intl Airport

Our best Lufthansa deals on Ireland to Chicago O'Hare Intl Airport flight tickets
Lufthansa
Nov 5
DUB5:10 amDublin
20h 55m
1 stop
ORD8:05 pmChicago O'Hare Intl
Nov 11
ORD9:50 pmChicago O'Hare Intl
13h 20m
1 stop
DUB5:10 pmDublin
$449
Find similar
Lufthansa
Nov 2
DUB5:10 amDublin
16h 10m
1 stop
ORD4:20 pmChicago O'Hare Intl
Nov 9
ORD6:35 pmChicago O'Hare Intl
7h 35m
DUB8:10 amDublin
$455
Find similar
Lufthansa
Oct 13
DUB5:55 amDublin
15h 00m
1 stop
ORD2:55 pmChicago O'Hare Intl
Oct 21
ORD8:20 pmChicago O'Hare Intl
7h 25m
DUB9:45 amDublin
$459
Find similar

KLM flights from Ireland to Chicago O'Hare Intl Airport

Our best KLM deals on Ireland to Chicago O'Hare Intl Airport flight tickets
KLM
Oct 5
ORK5:10 pmCork
27h 30m
1 stop
ORD2:40 pmChicago O'Hare Intl
Oct 12
ORD5:10 pmChicago O'Hare Intl
15h 30m
1 stop
ORK2:40 pmCork
$476
Find similar
KLM
Sep 25
ORK6:00 amCork
14h 10m
1 stop
ORD2:10 pmChicago O'Hare Intl
Sep 29
ORD5:10 pmChicago O'Hare Intl
15h 30m
1 stop
ORK2:40 pmCork
$477
Find similar
KLM
Mar 5
ORK1:25 pmCork
30h 55m
1 stop
ORD2:20 pmChicago O'Hare Intl
Mar 9
ORD5:25 pmChicago O'Hare Intl
18h 20m
1 stop
ORK4:45 pmCork
$561
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momondo Fare Finder

 
Customize your flight search to find flights from Ireland to Chicago O'Hare Intl Airport 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, momondo users made 832,500 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Ireland to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 10/28

7:05 pm-9:05 pm

1 stop31h 00m

Chicago O'Hare Intl

Wed 11/5

7:20 pm-11:45 am

1 stop34h 25m

$438

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 10/30

7:05 pm-5:45 pm

1 stop27h 40m

Chicago O'Hare Intl

Wed 11/5

7:20 pm-11:45 am

1 stop34h 25m

$439

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 11/2

10:45 am-5:00 pm

1 stop12h 15m

Chicago O'Hare Intl

Sun 11/9

8:40 pm-7:40 pm

1 stop17h 00m

$442

DublinChicago

DUB - ORD

DUBORD

Dublin

Mon 10/13

8:45 am-2:40 pm

1 stop11h 55m

Chicago O'Hare Intl

Tue 10/21

5:40 pm-11:55 am

1 stop12h 15m

$445

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 11/5

5:10 am-8:05 pm

1 stop20h 55m

Chicago O'Hare Intl

Tue 11/11

9:50 pm-5:10 pm

1 stop13h 20m

$449

DublinChicago

DUB - ORD

DUBORD

Dublin

Mon 11/3

11:30 am-2:00 pm

Nonstop8h 30m

Chicago O'Hare Intl

Fri 11/7

7:40 pm-9:00 am

Nonstop7h 20m

$454

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 11/2

5:10 am-4:20 pm

1 stop16h 10m

Chicago O'Hare Intl

Sun 11/9

6:35 pm-8:10 am

Nonstop7h 35m

$455

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 10/15

11:35 am-2:00 pm

Nonstop8h 25m

Chicago O'Hare Intl

Wed 10/22

9:15 pm-10:40 am

Nonstop7h 25m

$462

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 10/24

9:20 am-3:00 pm

1 stop35h 40m

Chicago O'Hare Intl

Mon 11/3

8:15 pm-7:10 am

1 stop28h 55m

$463

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 10/8

9:20 am-3:00 pm

1 stop35h 40m

Chicago O'Hare Intl

Mon 10/13

8:20 pm-9:45 am

Nonstop7h 25m

$466

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chicago from

How to get the cheapest flight ticket from Ireland to Chicago O'Hare Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

The month of February is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Ireland averaging around $505.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Wednesday when prices can be found for as low as $655. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from Ireland because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $818.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Flying to Chicago O'Hare Intl Airport from Ireland in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $722 when looking at flights departing in the afternoon. Try not to purchase tickets at noon because they tend to be around $818. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ireland to Chicago O'Hare Intl flight route?

Fly from Dublin to Chicago O'Hare Intl for the best Ireland - Chicago O'Hare Intl flight prices

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $606 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Ireland for as low as $535 on momondo.

What cabin class options are available on Ireland to Chicago O'Hare Intl flights?

There are 3 cabin classes available to choose from on Ireland to Chicago O'Hare Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ireland to Chicago O'Hare Intl Airport flights?

You could potentially save up to 10% on your flight if you consider stops on a Ireland to Chicago O'Hare Intl Airport flight.

Cheap Ireland to Chicago O'Hare Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ireland to Chicago O'Hare Intl Airport

Best Price Found

$574

Fastest flight time

8h 00m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from Ireland in the past 72 hours is $574. The best round-trip flight deal from Ireland to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $553.
The fastest flight from Ireland to Chicago O'Hare Intl Airport takes 8h 00m
Direct flights go from Ireland to Chicago O'Hare Intl Airport every day.
Search flight deals

  • When did momondo last update prices for flights from Ireland to Chicago O'Hare Intl Airport?

    Prices for flights from Ireland to Chicago O'Hare Intl Airport refresh daily.

  • How many operators does momondo search for flights from Ireland to Chicago O'Hare Intl Airport?

  • How old do you have to be to fly from Ireland to Chicago O'Hare Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ireland to Chicago O'Hare Intl Airport.

  • What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

    The required travel and health documents for your Chicago O'Hare Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Chicago O'Hare Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Ireland to Chicago O'Hare Intl Airport?

Best airlines flying from Ireland to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Ireland to Chicago O'Hare Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $393Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
Aer LingusPriceFrom $463Free CancellationRating
7.2
1,277 reviews
Search Aer Lingus flights
United AirlinesPriceFrom $473Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Lake Geneva
South Haven
Rockford
Schaumburg
Merrillville
Gurnee
Naperville
Rosemont
Kenosha
New Buffalo
Joliet
Oak Brook
Racine
Hammond
Orland Park
Tinley Park
Elgin
Aurora
Janesville
Benton Harbor

Why use momondo?

Why should I use momondo to find a flight deal from Ireland to Chicago?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ireland to Chicago for you.

Can I find flights from Ireland to Chicago with flexible booking policies on momondo?

momondo does allow users to show only those flights to Chicago from Ireland which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ireland to Chicago?

momondo helps you find the best flight between Ireland and Chicago by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ireland to Chicago right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Chicago, momondo offers a useful price alert feature which will track prices for flights to Chicago from Ireland and alert you when they change.

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