$396 Find Cheap Flights from Ireland to Chicago O'Hare Airport - Compare and Save

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Cheap Flights from Ireland to O'Hare Intl

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ireland to O'Hare Intl

Thu, Dec 3 - Wed, Dec 9
Icelandair Logo
11:30 am - 5:20 pmDUB  Dublin-ORD Chicago O'Hare Intl
11h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
6:30 pm - 10:15 amORD  Chicago O'Hare Intl-DUB Dublin
9h 45m1 stop Reykjavik Keflavik Intl
$515Icelandair
Fri, Dec 11 - Mon, Dec 14
Icelandair Logo
11:30 am - 5:20 pmDUB  Dublin-ORD Chicago O'Hare Intl
11h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
6:30 pm - 10:15 amORD  Chicago O'Hare Intl-DUB Dublin
9h 45m1 stop Reykjavik Keflavik Intl
$538Icelandair
Thu, Dec 10 - Mon, Dec 14
Icelandair Logo
11:30 am - 5:20 pmDUB  Dublin-ORD Chicago O'Hare Intl
11h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
6:30 pm - 10:15 amORD  Chicago O'Hare Intl-DUB Dublin
9h 45m1 stop Reykjavik Keflavik Intl
$538Icelandair
Thu, Dec 3 - Mon, Dec 7
Icelandair Logo
11:30 am - 5:20 pmDUB  Dublin-ORD Chicago O'Hare Intl
11h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
6:30 pm - 10:15 amORD  Chicago O'Hare Intl-DUB Dublin
9h 45m1 stop Reykjavik Keflavik Intl
$551Icelandair
Wed, Nov 11 - Fri, Nov 13
Aer Lingus Logo
3:50 pm - 6:20 pmDUB  Dublin-ORD Chicago O'Hare Intl
8h 30mnonstop
Aer Lingus Logo
8:05 pm - 9:30 amORD  Chicago O'Hare Intl-DUB Dublin
7h 25mnonstop
$639Aer Lingus
Sun, Dec 20 - Wed, Dec 30
Aer Lingus Logo
11:30 am - 2:10 pmDUB  Dublin-ORD Chicago O'Hare Intl
8h 40mnonstop
Aer Lingus Logo
3:55 pm - 5:15 amORD  Chicago O'Hare Intl-DUB Dublin
7h 20mnonstop
$653Aer Lingus
Tue, Dec 22 - Sun, Dec 27
Aer Lingus Logo
11:30 am - 2:10 pmDUB  Dublin-ORD Chicago O'Hare Intl
8h 40mnonstop
Aer Lingus Logo
3:55 pm - 5:15 amORD  Chicago O'Hare Intl-DUB Dublin
7h 20mnonstop
$665Aer Lingus
Mon, Nov 9 - Sun, Nov 15
United Airlines Logo
9:00 am - 3:38 pmDUB  Dublin-ORD Chicago O'Hare Intl
12h 38m1 stop Toronto Pearson Intl
United Airlines Logo
1:30 pm - 10:20 amORD  Chicago O'Hare Intl-DUB Dublin
14h 50m1 stop Washington, D.C. Dulles Intl
$667United Airlines
Mon, Nov 9 - Mon, Nov 16
United Airlines Logo
9:00 am - 5:43 pmDUB  Dublin-ORD Chicago O'Hare Intl
14h 43m1 stop Toronto Pearson Intl
United Airlines Logo
6:30 pm - 8:10 amORD  Chicago O'Hare Intl-DUB Dublin
7h 40mnonstop
$667United Airlines
Sat, Nov 14 - Mon, Nov 16
United Airlines Logo
9:00 am - 3:38 pmDUB  Dublin-ORD Chicago O'Hare Intl
12h 38m1 stop Toronto Pearson Intl
United Airlines Logo
6:30 pm - 8:10 amORD  Chicago O'Hare Intl-DUB Dublin
7h 40mnonstop
$667United Airlines
Booking Insights

KAYAK's insights & trends for flights to O'Hare Intl

Get data-powered insights and trends for flights to O'Hare Intl to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to Chicago O'Hare Airport?

In the last 5 days, the cheapest flight deal to Chicago O'Hare Airport was found on the route from Shannon, at $515 return. The most popular connection is from Dublin to Chicago O'Hare Airport and KAYAK users have found round-trip deals for as low as $515 in the last 5 days.

How much is a flight to Chicago O'Hare Intl Airport?

A flight to Chicago O'Hare Intl Airport costs $721 on average. The cheapest price found on KAYAK in the last 2 weeks cost $425 and departed from Dublin. The most popular routes on KAYAK are Dublin to Chicago O'Hare Intl Airport which costs $878 on average, and Shannon to Chicago O'Hare Intl Airport, which costs $708 on average.

What is the cheapest day to fly to Chicago?

Based on KAYAK data, the cheapest day to fly to Chicago is Thursday where round-trip tickets can be as cheap as $745. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $959 on average.

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

The cheapest month for flights to Chicago O'Hare Intl Airport is November, where tickets cost $557 on average for return flights. On the other hand, the most expensive months are July and August, where the average cost of tickets from Ireland is $847 and $798 respectively. For one-way flights, the best month to travel is November with an average price of $465.

What is the cheapest time of day to fly to Chicago O'Hare Intl Airport?

The cheapest time of day to fly to Chicago O'Hare Intl Airport is generally in the evening, when round-trip flights cost $780 on average. The most expensive time of day to fly to Chicago O'Hare Intl Airport is generally in the morning, which is peak travel time and where the average cost of a ticket is $815.

What is a good deal for flights to Chicago O'Hare Intl Airport?

If you’re looking for cheap airfare to Chicago O'Hare Intl Airport, 25% of our users found tickets to Chicago O'Hare Intl Airport for the following prices or less: From Dublin $679 round-trip.

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

To get a below average price, you should book around 3 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low season

September

Cheapest flight

$396
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Shannon to Chicago

Flights from Ireland to O'Hare Intl: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Ireland to O'Hare Intl 
Verified travelerFlew with Aer Lingus-Sep 2026
Get there early enough to be able to relax and shop a bit
JohannaFlew with Aer Lingus-Feb 2026
Are Ling’s was great, and boards from the back of the plane, which made boarding way less chaotic and much quicker.

FAQs - booking Chicago O'Hare Airport flights

  • What is the cheapest flight to Chicago O'Hare Airport?

    In the last 5 days, the cheapest flight deal to Chicago O'Hare Airport was found on the route from Shannon, at $515 return. The most popular connection is from Dublin to Chicago O'Hare Airport and KAYAK users have found round-trip deals for as low as $515 in the last 5 days.

  • How far is Chicago O'Hare Intl Airport from central Chicago?

    The city center of Chicago is 16 miles from Chicago O'Hare Intl Airport.

  • How much is a flight to Chicago?

    On average, a flight to Chicago costs $721. The cheapest price found on KAYAK in the last 2 weeks cost $425 and departed from Dublin Airport.

  • How does KAYAK find such low prices on flights to Chicago O'Hare Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Chicago O'Hare Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Chicago O'Hare Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Chicago O'Hare Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago O'Hare Airport with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Chicago O'Hare Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago O'Hare Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Chicago O'Hare Airport

  • Looking for cheap airfare to Chicago O'Hare Airport? 25% of our users found round-trip tickets to Chicago O'Hare Airport for the following prices or less: From Dublin $1,038, from Shannon $2,447

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Chicago O'Hare Airport flight deals.

Reviews of the top airlines flying from Ireland to O'Hare Intl

 
Need help choosing which airline to fly with to O'Hare Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.3
Aer LingusOverall score based on 1868 reviews
7.5Boarding
7.1Entertainment
6.7Food
7.2Comfort
8.1Crew
Airline reviews

Still some confusion about my baggage which was disconcerting. It was nice that there was extra space on the flight for comfort reasons. Staff very friendly

8.0 ExcellentAna, Oct 2026
Read more Aer Lingus reviews

Still some confusion about my baggage which was disconcerting. It was nice that there was extra space on the flight for comfort reasons. Staff very friendly

The plane from Venice to Dublin ran out of food. They did not restock the plane in Venice.

The crew was first rate. They allowed me to switch my middle seat to an isle seat and it made my flight home so much more comfortable.

Very comfortable flight. Great service, food options, and entertainment options. With Wi-Fi!

Small plane. Tight seating . What can one say except that it was fast!

The flights are literally always delayed arriving, boarding and taking off so they are always late for the connection. I planned ahead so I was okay but many others aren't. The food was terrible. The staff was very pleasant. I appreciate boarding back to front.

All aspects were excellent - it helped that the flight was only 2/3 full and I had no one sitting in my row. The Pre-check (US Passport Control and Customs) in Dublin made everything so easy when we arrived in Chicago.

Very nice experience. Flight had good entertainment system and good food options. Customer service was very friendly and nice as well.

The same as I stated prior. We incurred extra costs that should be reimbursed, given we were not communicated with about schedule changes.

My flight from Dublin was delayed two hours which ment that I missed my connecting flight to Phoenix. American Airlines provided a hotel room and rebooked my flight for 7:30 AM the next day. I didn't get to the room until 11 pm and I had to be at the airport the next day by 5 AM. The airlines did their best but the schedule was challenging for an 81 year old.

Flight and crew were great. Need more legroom and do not allow seats to recline.

We arrived to Chicago nearly 30 minutes early, which was great, but then was on the ground for over an hour because the gate was not available. The issue I had was the pilot estimation was frustrating. First he said he was informed it would be 20 minutes but he said "it will probably be more like 10 minutes". After 30 minutes he came back on the comm and said it would be another 10 minutes, maybe 20. I understand he was only giving estimates but he also layered in his own gut feel. We were never told why we didn't have a gate even after our scheduled entry.

Just sat on the run way after we arrived early

The Code Share with Air Canada was not very streamlined. I had to check in at airport (not online) on the outbound and return flights

Stored my cloth purse under seat in front off me as instructed. When I retrieved it, half of it was soaked, along with everything inside it. I don’t really know how that could have been prevented because the area did not look wet, but I was not happy about it.

Phx - ORD was nice 737 with starlink and the ORD - grr was ancient bare bones airbus with not even a power port lol

It was easy to board, and the staff was friendly and helpful. What could have been better is that I shouldn't have to pay extra for a seat that doesn't recline.

Was on the plane sitting longer than the actual flight in air was, boarded at 5:45p and didn't take off until 6:50p flight was only about 30 minutes long. Just was poor experience will booking more with American Airlines.

The couple in front of me were constantly talking over the announcement from the captain and this was annoying me.

The first leg of my trip the Republic Airlines aircraft was late due to a maintenance problem. Then I called United to reroute. Their reroute airline lost my bag but found it and returned it two days later. Hopefully my return trip home is better.

Traveling to a place near O'Hare Intl?

Book flights to O'Hare Intl if you plan to visit one of these locations
Gurnee
Merrillville
South Haven
Oak Brook
Tinley Park
Hammond
Saint Joseph
Des Plaines
Elk Grove Village
Hoffman Estates
Oakbrook Terrace
Portage
South Holland
Willowbrook
Lansing
Lisle
Alsip
Valparaiso
Northbrook
Delavan

More options for your flight to O'Hare Intl