$306 Find Cheap Flights from Ireland to Chicago O'Hare Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to O'Hare Intl departing on 9/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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These are the airlines KAYAK users have selected most often from within our search results for flights to Chicago, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Chicago, as well as popular online travel agencies
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Cheap Flights from Ireland to O'Hare Intl

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ireland to O'Hare Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
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, Oct 30 - Mon, Nov 3
Scandinavian Airlines Logo
11:15 am - 5:45 pmDUB-ORD
35h 30m2 stops
Scandinavian Airlines Logo
7:20 pm - 6:20 pmORD-DUB
17h 00m1 stop
$355Scandinavian Airlines
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Wed, Oct 29 - Mon, Nov 3
Scandinavian Airlines Logo
7:05 pm - 5:45 pmDUB-ORD
27h 40m1 stop
Scandinavian Airlines Logo
7:20 pm - 6:20 pmORD-DUB
17h 00m1 stop
$356Scandinavian Airlines
Find Deal
Wed, Aug 27 - Sat, Sep 6
Icelandair Logo
12:15 pm - 6:15 pmDUB-ORD
12h 00m1 stop
Icelandair Logo
7:25 pm - 11:05 amORD-DUB
9h 40m1 stop
$382Icelandair
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Wed, Sep 17 - Tue, Sep 30
Icelandair Logo
12:15 pm - 6:15 pmDUB-ORD
12h 00m1 stop
Icelandair Logo
7:25 pm - 11:05 amORD-DUB
9h 40m1 stop
$383Icelandair
Find Deal
Mon, Sep 15 - Mon, Sep 29
TAP AIR PORTUGAL Logo
5:30 am - 4:40 pmDUB-ORD
17h 10m1 stop
TAP AIR PORTUGAL Logo
6:10 pm - 6:05 pmORD-DUB
17h 55m1 stop
$397TAP AIR PORTUGAL
Find Deal
Mon, Sep 15 - Sat, Sep 20
TAP AIR PORTUGAL Logo
5:30 am - 4:40 pmDUB-ORD
17h 10m1 stop
TAP AIR PORTUGAL Logo
6:15 pm - 12:05 amORD-DUB
23h 50m1 stop
$398TAP AIR PORTUGAL
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Tue, Sep 16 - Mon, Sep 29
United Airlines Logo
9:20 am - 8:11 pmDUB-ORD
16h 51m1 stop
United Airlines Logo
8:20 pm - 9:45 amORD-DUB
7h 25mnonstop
$438United Airlines
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Tue, Sep 16 - Mon, Sep 29
United Airlines Logo
9:20 am - 8:11 pmDUB-ORD
16h 51m1 stop
United Airlines Logo
4:00 pm - 11:10 amORD-DUB
13h 10m1 stop
$439United Airlines
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Sat, Nov 8 - Wed, Nov 19
Aer Lingus Logo
3:20 pm - 5:55 pmDUB-ORD
8h 35mnonstop
Aer Lingus Logo
3:55 pm - 5:15 amORD-DUB
7h 20mnonstop
$453Aer Lingus
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Sat, Sep 13 - Tue, Sep 30
Aer Lingus Logo
4:40 pm - 7:00 pmDUB-ORD
8h 20mnonstop
Aer Lingus Logo
9:15 pm - 10:40 amORD-DUB
7h 25mnonstop
$491Aer Lingus
Find Deal
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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 month to fly to Chicago O'Hare Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Chicago O'Hare Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to Chicago O'Hare Intl Airport is February, where tickets cost $504 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 $782 and $667 respectively. For one-way flights, the best month to travel is February with an average price of $504.

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 $702 round-trip, from Shannon $751 round-trip.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Chicago O'Hare Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.


Good to know

Low seasonJanuary
High seasonOctober
Cheapest flight$306
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Dublin to Chicago

FAQs - booking Chicago O'Hare Airport flights

  • 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 $849. The cheapest price found on KAYAK in the last 2 weeks cost $444 and departed from Dublin Airport.

  • What is the cheapest day to fly to Chicago?

    Based on KAYAK data, the cheapest day to fly to Chicago is Wednesday where round-trip tickets can be as cheap as $704. On the other hand, the most expensive day to fly is Thursday, where round-trip prices are $825 on average.

  • 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.

  • 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 morning, when round-trip flights cost $748 on average. The most expensive time of day to fly to Chicago O'Hare Intl Airport is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $827.

  • How many direct flights to Chicago O'Hare Intl Airport are there each week?

    Each week there are around 9,732 direct flights from within Ireland to Chicago O'Hare Intl Airport. The most common day for departures is Sunday, with 15% of flights taking off on this day.

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 Shannon $995, from Dublin $1,002
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Chicago O'Hare Airport flight deals.

Top airlines flying from Ireland to O'Hare Intl

 
See real verified KAYAK customer reviews for airlines flying to Chicago. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Ireland to Chicago. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
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.
7.4
United AirlinesOverall score based on 8790 reviews
7.0Entertainment
8.1Crew
7.3Comfort
7.7Boarding
6.6Food
Airline reviews

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

6.0 GoodAnonymous, Jun 2025MLI - ORD
Read more United Airlines reviews

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

I liked that the flight was nonstop from ORD to CIU for $200 round trip.

All flight attendants could benefit by taking an international flight on Qantas Airline. Qantas attendants are much more hospitable in every way. Much superior than and attendants on any US airline.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

The first flight was better in terms of the aircraft.

So far so good but food and entertainment are not available for this flight

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

Very modern plane. Good seat spacing. Meals were good. Screens had tons of movies and worked

I would definitely use a Linus again, the price was right, the service is excellent. No delays. Wish I had a direct flight from my hometown Detroit.

At check-in the unmanned machines said QR code was invalid so had to queue for over an hour to check in bags

i used to fly aer Lingus regularly but due to price - poor seating etc i have been using other carriers - i now have aer lingus in my state and the price is always the highest - i have flown to Ireland 11 times in last 24 months and have not used Hartford because of price

Nicest staff I’ve experienced on a plane! Good food, great entertainment, and they gave out little blankets that my kids loved. All in all, great experience.

This flight was of exactly the same high standard as the outbound leg, exactly a week earlier - except that we didn't have any food or drink because it departed at around midnight.

Unfortunately the flight was delayed for 50 min. Just as we were about to board so that was a drag. The boarding was average. The bag check in process was new to us and efficient. And the flight itself was smooth- basically no turbulence.

Food was very bad. Boarding was disorganized and messy. Crew was friendly

It was ok not that much because I always travel with Emirates airlines, Etihad, airlines, Qatar airlines compare to them food and comfortable was too low . Staff was good . Helpful

Noted in last review. Good to know, though air Lingus on European flights does not offer any food or drink, even though we were on the plane for 3 1/2 hours from Naples to Dublin everything you had to purchase even water.

Boarding seemed a bit chaotic and we had to walk outside across the tarmac. Passengers of all ages had to drag carry on luggage up the outside stairway into the aircraft. There was no WiFi. Very uncomfortable crammed seats. Glad in-air time was only an hour!

Everything you need to know for your flight to O'Hare Intl

Information on the airport you'll fly into in Chicago

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