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Cheap flights from Ireland to Chicago from €339

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 7/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ireland to Chicago

Recent return flight deals from Ireland to Chicago

Logo
11:45 - 20:05DUB-ORD
14h 20m1 stop
Logo
18:35 - 08:10ORD-DUB
7h 35mdirect
€377
Find Deal
Wed, 5 Nov - Tue, 11 Nov
Scandinavian Airlines Logo
11:30 - 18:45DUB-ORD
36h 15m2 stops
Scandinavian Airlines Logo
19:20 - 19:35ORD-DUB
18h 15m2 stops
€380Scandinavian Airlines
Find Deal
Wed, 29 Oct - Sun, 2 Nov
Aer Lingus Logo
11:30 - 14:00DUB-ORD
8h 30mdirect
Aer Lingus Logo
22:45 - 15:40ORD-DUB
11h 55m1 stop
€382Aer Lingus
Find Deal
Sun, 1 Mar - Wed, 11 Mar
American Airlines Logo
10:55 - 17:45DUB-ORD
11h 50m1 stop
American Airlines Logo
20:40 - 14:15ORD-DUB
11h 35m1 stop
€386American Airlines
Find Deal
Sat, 1 Nov - Sat, 8 Nov
Aer Lingus Logo
11:35 - 14:00DUB-ORD
8h 25mdirect
Aer Lingus Logo
15:45 - 05:10ORD-DUB
7h 25mdirect
€386Aer Lingus
Find Deal
Mon, 13 Oct - Mon, 20 Oct
American Airlines Logo
11:30 - 20:26DUB-ORD
14h 56m1 stop
American Airlines Logo
18:45 - 09:40ORD-DUB
32h 55m1 stop
€391American Airlines
Find Deal
Wed, 17 Dec - Tue, 6 Jan
British Airways Logo
08:50 - 20:50DUB-ORD
18h 00m2 stops
British Airways Logo
11:48 - 09:35ORD-DUB
15h 47m2 stops
€392British Airways
Find Deal
Tue, 11 Nov - Tue, 18 Nov
United Airlines Logo
09:20 - 18:41DUB-ORD
15h 21m1 stop
United Airlines Logo
20:20 - 09:45ORD-DUB
7h 25mdirect
€396United Airlines
Find Deal
Sat, 27 Sep - Tue, 30 Sep
United Airlines Logo
09:20 - 20:04DUB-ORD
16h 44m1 stop
United Airlines Logo
12:45 - 07:30ORD-DUB
12h 45m2 stops
€397United Airlines
Find Deal
Fri, 24 Oct - Mon, 3 Nov
British Airways Logo
10:30 - 23:31DUB-ORD
19h 01m2 stops
British Airways Logo
17:10 - 09:50ORD-DUB
10h 40m1 stop
€415British Airways
Find Deal
Thu, 13 Nov - Sat, 22 Nov

Delta flights from Ireland to Chicago O'Hare Intl Airport

Our best Delta deals on Ireland to Chicago O'Hare Intl Airport flight tickets
Delta
31 Oct
DUB05:55Dublin
14h 25m
1 stop
ORD15:20Chicago O'Hare Intl
4 Nov
ORD16:15Chicago O'Hare Intl
17h 30m
2 stops
DUB15:45Dublin
€395
Find similar
Delta
23 Sept
DUB05:55Dublin
14h 15m
1 stop
ORD14:10Chicago O'Hare Intl
7 Oct
ORD18:20Chicago O'Hare Intl
14h 40m
2 stops
DUB15:00Dublin
€396
Find similar
Delta
30 Oct
DUB05:55Dublin
20h 24m
2 stops
ORD21:19Chicago O'Hare Intl
4 Nov
ORD16:15Chicago O'Hare Intl
17h 30m
2 stops
DUB15:45Dublin
€400
Find similar

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
23 Oct
DUB05:55Dublin
13h 00m
1 stop
ORD12:55Chicago O'Hare Intl
3 Nov
ORD21:50Chicago O'Hare Intl
13h 20m
1 stop
DUB17:10Dublin
€381
Find similar
Lufthansa
29 Oct
DUB11:45Dublin
14h 20m
1 stop
ORD21:05Chicago O'Hare Intl
2 Nov
ORD21:50Chicago O'Hare Intl
13h 20m
1 stop
DUB17:10Dublin
€384
Find similar
Lufthansa
2 Nov
DUB05:10Dublin
20h 55m
1 stop
ORD21:05Chicago O'Hare Intl
9 Nov
ORD18:35Chicago O'Hare Intl
7h 35m
DUB08:10Dublin
€387
Find similar

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 15 September 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 5/11

11:45-20:05

1 stop14h 20m

Chicago O'Hare Intl

Tue 11/11

18:35-08:10

Nonstop7h 35m

€377

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 29/10

11:30-18:45

2 stops36h 15m

Chicago O'Hare Intl

Sun 2/11

19:20-19:35

2 stops18h 15m

€380

DublinChicago

DUB - ORD

DUBORD

Dublin

Sun 1/3

11:30-14:00

Nonstop8h 30m

Chicago O'Hare Intl

Wed 11/3

22:45-15:40

1 stop11h 55m

€382

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 1/11

10:55-17:45

1 stop11h 50m

Chicago O'Hare Intl

Sat 8/11

20:40-14:15

1 stop11h 35m

€386

DublinChicago

DUB - ORD

DUBORD

Dublin

Mon 13/10

11:35-14:00

Nonstop8h 25m

Chicago O'Hare Intl

Mon 20/10

15:45-05:10

Nonstop7h 25m

€386

DublinChicago

DUB - ORD

DUBORD

Dublin

Wed 17/12

11:30-20:26

1 stop14h 56m

Chicago O'Hare Intl

Tue 6/1

18:45-09:40

1 stop32h 55m

€391

DublinChicago

DUB - ORD

DUBORD

Dublin

Tue 11/11

08:50-20:50

2 stops18h 00m

Chicago O'Hare Intl

Tue 18/11

11:48-09:35

2 stops15h 47m

€392

DublinChicago

DUB - ORD

DUBORD

Dublin

Sat 27/9

09:20-18:41

1 stop15h 21m

Chicago O'Hare Intl

Tue 30/9

20:20-09:45

Nonstop7h 25m

€396

DublinChicago

DUB - ORD

DUBORD

Dublin

Fri 24/10

09:20-20:04

1 stop16h 44m

Chicago O'Hare Intl

Mon 3/11

12:45-07:30

2 stops12h 45m

€397

DublinChicago

DUB - ORD

DUBORD

Dublin

Thu 13/11

10:30-23:31

2 stops19h 01m

Chicago O'Hare Intl

Sat 22/11

17:10-09:50

1 stop10h 40m

€415

Flights are sorted by cheapest return 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?

In general, September 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 €429. If you are unable to visit Chicago O'Hare Intl Airport during the month of September, then departing from Ireland during the month February is also very affordable. Most momondo users find prices during this month for around €430.

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 €612. 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 €715.

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 €516. Flights to Chicago O'Hare Intl Airport are more costly at midday, with an average ticket price of €675. 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 €455 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 57% 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

€687

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 €687. The best return flight deal from Ireland to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is €466.
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 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 €350Free CancellationRating
7.0
544 reviews
Search Icelandair flights
United AirlinesPriceFrom €353Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
Aer LingusPriceFrom €381Free CancellationRating
7.2
1,270 reviews
Search Aer Lingus flights
British AirwaysPriceFrom €397Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
American AirlinesPriceFrom €434Free 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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