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Cheap flights from Ireland to Chicago from €354

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 7/9. 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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Find the cheapest flights from Ireland to Chicago

Recent return flight deals from Ireland to Chicago

Delta Logo
08:50 - 15:20DUB-ORD
11h 30m1 stop
Delta Logo
17:20 - 15:45ORD-DUB
16h 25m1 stop
€397Delta
Find Deal
Wed, 29 Oct - Tue, 4 Nov
Logo
05:55 - 15:20DUB-ORD
14h 25m1 stop
Logo
17:20 - 15:45ORD-DUB
16h 25m1 stop
€398
Find Deal
Fri, 31 Oct - Tue, 4 Nov
Icelandair Logo
14:15 - 21:15DUB-ORD
13h 00m1 stop
Icelandair Logo
19:25 - 13:15ORD-DUB
11h 50m1 stop
€399Icelandair
Find Deal
Thu, 18 Sep - Sun, 28 Sep
British Airways Logo
10:55 - 18:45DUB-ORD
13h 50m1 stop
British Airways Logo
18:45 - 12:45ORD-DUB
12h 00m1 stop
€399British Airways
Find Deal
Tue, 23 Dec - Sat, 10 Jan
British Airways Logo
10:40 - 18:15DUB-ORD
13h 35m1 stop
British Airways Logo
16:34 - 14:20ORD-DUB
15h 46m2 stops
€404British Airways
Find Deal
Thu, 23 Oct - Tue, 4 Nov
United Airlines Logo
09:20 - 14:55DUB-ORD
11h 35m1 stop
United Airlines Logo
20:20 - 09:45ORD-DUB
7h 25mdirect
€409United Airlines
Find Deal
Sat, 13 Sep - Mon, 29 Sep
United Airlines Logo
09:00 - 15:10DUB-ORD
12h 10m1 stop
United Airlines Logo
14:39 - 10:20ORD-DUB
13h 41m1 stop
€410United Airlines
Find Deal
Sun, 16 Nov - Wed, 26 Nov
Aer Lingus Logo
16:40 - 19:00DUB-ORD
8h 20mdirect
Aer Lingus Logo
20:40 - 09:00ORD-DUB
7h 20mdirect
€428Aer Lingus
Find Deal
Tue, 21 Oct - Tue, 28 Oct
Icelandair Logo
12:15 - 18:15DUB-ORD
12h 00m1 stop
Icelandair Logo
19:30 - 11:15ORD-DUB
9h 45m1 stop
€430Icelandair
Find Deal
Wed, 22 Oct - Sat, 25 Oct
Aer Lingus Logo
16:40 - 19:00DUB-ORD
8h 20mdirect
Aer Lingus Logo
20:40 - 09:00ORD-DUB
7h 20mdirect
€438Aer Lingus
Find Deal
Fri, 24 Oct - Wed, 29 Oct

Icelandair flights from Ireland to Chicago O'Hare Intl Airport

Our best Icelandair deals on Ireland to Chicago O'Hare Intl Airport flight tickets
Icelandair
18 Sept
DUB14:15Dublin
13h 00m
1 stop
ORD21:15Chicago O'Hare Intl
28 Sept
ORD19:25Chicago O'Hare Intl
11h 50m
1 stop
DUB13:15Dublin
€399
Find similar
Icelandair
22 Oct
DUB12:15Dublin
12h 00m
1 stop
ORD18:15Chicago O'Hare Intl
25 Oct
ORD19:30Chicago O'Hare Intl
9h 45m
1 stop
DUB11:15Dublin
€430
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British Airways flights from Ireland to Chicago O'Hare Intl Airport

Our best British Airways deals on Ireland to Chicago O'Hare Intl Airport flight tickets
British Airways
23 Dec
DUB10:55Dublin
13h 50m
1 stop
ORD18:45Chicago O'Hare Intl
10 Jan
ORD18:45Chicago O'Hare Intl
12h 00m
1 stop
DUB12:45Dublin
€399
Find similar
British Airways
23 Oct
DUB10:40Dublin
13h 35m
1 stop
ORD18:15Chicago O'Hare Intl
4 Nov
ORD16:34Chicago O'Hare Intl
15h 46m
2 stops
DUB14:20Dublin
€404
Find similar
British Airways
16 Sept
DUB08:35Dublin
16h 15m
2 stops
ORD18:50Chicago O'Hare Intl
2 Oct
ORD19:10Chicago O'Hare Intl
13h 25m
1 stop
DUB14:35Dublin
€417
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momondo Fare Finder

 
Customise 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 13,528 searches. Data last updated 28 August 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

Wed 29/10

08:50-15:20

1 stop11h 30m

Chicago O'Hare Intl

Tue 4/11

17:20-15:45

1 stop16h 25m

€397

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 31/10

05:55-15:20

1 stop14h 25m

Chicago O'Hare Intl

Tue 4/11

17:20-15:45

1 stop16h 25m

€398

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 18/9

14:15-21:15

1 stop13h 00m

Chicago O'Hare Intl

Sun 28/9

19:25-13:15

1 stop11h 50m

€399

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 23/12

10:55-18:45

1 stop13h 50m

Chicago O'Hare Intl

Sat 10/1

18:45-12:45

1 stop12h 00m

€399

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 23/10

10:40-18:15

1 stop13h 35m

Chicago O'Hare Intl

Tue 4/11

16:34-14:20

2 stops15h 46m

€404

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 13/9

09:20-14:55

1 stop11h 35m

Chicago O'Hare Intl

Mon 29/9

20:20-09:45

Nonstop7h 25m

€409

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 16/11

09:00-15:10

1 stop12h 10m

Chicago O'Hare Intl

Wed 26/11

14:39-10:20

1 stop13h 41m

€410

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 21/10

16:40-19:00

Nonstop8h 20m

Chicago O'Hare Intl

Tue 28/10

20:40-09:00

Nonstop7h 20m

€428

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 22/10

12:15-18:15

1 stop12h 00m

Chicago O'Hare Intl

Sat 25/10

19:30-11:15

1 stop9h 45m

€430

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 24/10

16:40-19:00

Nonstop8h 20m

Chicago O'Hare Intl

Wed 29/10

20:40-09:00

Nonstop7h 20m

€438

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

In general, February is the cheapest month to fly from Ireland to Chicago O'Hare Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around €434. If you are unable to visit Chicago O'Hare Intl Airport during the month of February, then departing from Ireland during the month November is also very affordable. Most momondo users find prices during this month for around €445.

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

On average, the least expensive day to fly to Chicago O'Hare Intl Airport from Ireland is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as €611. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Chicago O'Hare Intl Airport is Sunday, with ticket prices averaging around €709.

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

Our data shows that the cheapest Ireland to Chicago O'Hare Intl Airport flights are usually those with departure times in the evening. Our users have found flights to Chicago O'Hare Intl Airport in the evening for as low as €522. Flights to Chicago O'Hare Intl Airport are more costly at midday, with an average ticket price of €681. Departure times at midday fall within the peak daily travel times, which is why tickets can be more expensive.

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 €515 when searching weeks before you fly. 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 €442 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.

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

€713

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 €713. The best return flight deal from Ireland to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is €470.
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.
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  • 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 stopovers 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 necessary travel and health documents for your Chicago O'Hare Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted 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
IcelandairPriceFrom €338Free CancellationRating
7.0
537 reviews
Search Icelandair flights
United AirlinesPriceFrom €357Free CancellationRating
7.4
8,944 reviews
Search United Airlines flights
British AirwaysPriceFrom €378Free CancellationRating
6.7
7,316 reviews
Search British Airways flights
Aer LingusPriceFrom €383Free CancellationRating
7.2
1,240 reviews
Search Aer Lingus flights
American AirlinesPriceFrom €420Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Travelling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Rosemont
Oakbrook Terrace
Elk Grove Village
Crystal Lake

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ireland to Chicago . Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to Chicago from Ireland on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ireland to Chicago.

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

If you are not ready to book a flight from Ireland to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.

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