£417 Find Cheap Flights from Ireland to Chicago – Compare and Save

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 23/10. 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, 0 bags

Save 26% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Booking Insights
Flight Deals

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 return 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 return flight deals from Ireland to O'Hare Intl

Tue, 8 Sep - Tue, 15 Sep
Delta Logo
11:10 - 22:32
DUB
-
ORD
17h 22m
2 stops
Delta Logo
10:29 - 08:15
ORD
-
DUB
15h 46m
2 stops
£463Delta
Tue, 8 Sep - Tue, 15 Sep
Delta Logo
11:10 - 22:32
DUB
-
ORD
17h 22m
2 stops
Delta Logo
10:30 - 08:15
ORD
-
DUB
15h 45m
2 stops
£463Delta
Thu, 27 Aug - Sat, 5 Sep
Finnair Logo
09:30 - 11:30
DUB
-
ORD
8h 00mdirect
Finnair Logo
22:20 - 11:50
ORD
-
DUB
7h 30mdirect
£464Finnair
Thu, 27 Aug - Sat, 5 Sep
Finnair Logo
09:40 - 17:50
DUB
-
ORD
14h 10m
1 stop
Finnair Logo
22:20 - 11:50
ORD
-
DUB
7h 30mdirect
£465Finnair
Mon, 24 Aug - Mon, 31 Aug
JetBlue Logo
10:40 - 19:27
DUB
-
ORD
14h 47m
1 stop
JetBlue Logo
06:00 - 09:00
ORD
-
DUB
21h 00m
1 stop
£466JetBlue
Fri, 4 Sep - Tue, 8 Sep
Aer Lingus Logo
11:35 - 14:00
DUB
-
ORD
8h 25mdirect
Aer Lingus Logo
21:00 - 10:35
ORD
-
DUB
7h 35mdirect
£469Aer Lingus
Fri, 28 Aug - Sun, 6 Sep
JetBlue Logo
11:30 - 21:58
DUB
-
ORD
16h 28m
1 stop
JetBlue Logo
20:20 - 08:20
ORD
-
DUB
30h 00m
1 stop
£469JetBlue
Thu, 1 Oct - Thu, 8 Oct
Aer Lingus Logo
11:35 - 14:00
DUB
-
ORD
8h 25mdirect
Aer Lingus Logo
21:00 - 10:35
ORD
-
DUB
7h 35mdirect
£472Aer Lingus
Mon, 19 Oct - Sat, 31 Oct
Icelandair Logo
14:15 - 18:15
DUB
-
ORD
10h 00m
1 stop
Icelandair Logo
19:30 - 10:15
ORD
-
DUB
9h 45m
1 stop
£491Icelandair
Sun, 27 Dec - Thu, 7 Jan
Icelandair Logo
11:30 - 17:20
DUB
-
ORD
11h 50m
1 stop
Icelandair Logo
18:30 - 10:15
ORD
-
DUB
9h 45m
1 stop
£554Icelandair
Booking Insights

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

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

What is the cheapest day to fly to Chicago?

The average price of all round-trip flights to Chicago O'Hare Intl Airport clicked on KAYAK for each day over the last 12 months.

Based on KAYAK data, the cheapest day to fly to Chicago is Wednesday where round-trip tickets can be as cheap as £551. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are £668 on average.

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 round-trip 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 November, where tickets cost £358 on average for return flights. On the other hand, the most expensive months are August and July, where the average cost of tickets from Ireland is £641 and £637 respectively. For one-way flights, the best month to travel is February with an average price of £375.

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

The average price for all round-trip flights to Chicago O'Hare Intl Airport depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Chicago O'Hare Intl Airport is generally in the evening, when round-trip flights cost £486 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 £631.

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 £535 return.

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 3 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know - Cheap tickets from Ireland to Chicago

Low season

September

Cheapest flight

£417
Best time to beat the crowds (16% less expensive on average)
Most popular time to fly and prices are also 7% lower on average.
Flight from Dublin to Chicago O'Hare Airport

FAQs - booking Chicago flights

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

    The distance between Chicago O'Hare Intl Airport and the city centre of Chicago is 16 miles.

  • How much is a flight to Chicago?

    On average, a flight to Chicago costs £664. The cheapest price found on KAYAK in the last 2 weeks cost £392 and departed from Dublin Airport.

  • How does KAYAK find such low prices on flights to Chicago?

    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.

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

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

  • What is the Hacker Fare option on flights to Chicago?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Chicago 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?

    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 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

  • Looking for cheap airfare to Chicago? 25% of our users found round-trip tickets to Chicago for the following prices or less: Cheap flights to Chicago from Dublin £1,030
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Chicago flight deals.

Reviews of the top 5 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.
7.6
FinnairOverall score based on 1427 reviews
6.7Food
7.7Boarding
7.4Comfort
6.9Entertainment
8.2Crew
Airline reviews

The food was delicious. There has been a major improvement here in the last few years. Excellent, friendly service. An enjoyable experience.

10.0 ExcellentMatti, Jul 2026
HEL - JFK
Read more Finnair reviews

The food was delicious. There has been a major improvement here in the last few years. Excellent, friendly service. An enjoyable experience.

Awful. Delayed for unknown reason. Boarded late, part of a Tight connection ands had to go through customs and immigration. And they lost my bags.

Late, dirty cabin, charging ports broken, uncomfortable, no tomato juice, barely edible food

Flight on time, landed well ahead of schedule. Attendants were excellent and responsive

The crew was friendly, and the flight landed on time

Rude Iberia security crew at the Madrid terminal. No Iberia officials to be found to redress complaints at the gate. No supervisors. Nothing for processing upgrades at the gate Iberia app did not work to let me upgrade my options to higher classes. No water was offered on a hot day in Madrid. Madrid airport air conditioning was so weak that people were sweating. Never book on any airlines that codeshare with Iberia.

Great if not for the boarding by bus at Heathrow terminal 3. Medieval disappointing time-consuming and very hard on handicapped flyers. It was awful

Do not use KAYAK or Finair for future travel. Unless you purchase the tickets directly from the airline, you were going to have a difficult time checking in. Kayak canceled my flights twice and ended up causing great difficulty in me getting back from Europe because they double sold my tickets between American Airlines and Finair. The event caused significant delays and led to me having to rebook my flights.

It was listed on my ticket as Finnair but there was no indication that the flight was Finnair. In fact the number was even different. There were no employees there until exactly 2 hours before so we had to wait in line at Iberia and hope

Flight were delayed which made me miss all the other flights. Bags are still missing from 2 weeks ago. This airline is worse the Spirit Airlines!

Gluten free snack options and meals that offer both gluten free and dairy free.

Not a bad flight but a long delay boarding and taking off due to the pilot not arriving on time.

I would have preferred a flight voucher and to hop on a different flight. Delayed over 6 hours.

I almost missed my connection in Chicago due to having to wait on a gate to be open I am assuming. Having to run from E terminal to C terminal and I barely made it there before they closed the door. This may not be the actual airline's fault it's crazy how there is so little time between flight especially when they are placed so far apart in the airport.

The Wi-Fi did not work, so you weren't able to watch entertainment on your own device. They did not have wired headphones so you couldn't watch it on the in-seat entertainment screen either. There was plenty of time to do a drink and snag service but the flight attendants chose not to.

Great experience, boarding was fast and efficient, so much so that we arrived to Chicago very early

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

The seats on this flight weren’t as comfortable as we had expected. Even leaned back these seats left us feeling crappy in our backs. Also we had to use our own tablets for movies, but nothing in the seats in front of us to hold the tablets up.

The head rest is too big and cannot be placed differently/removed. Causes one head to tilt forward and increase back pain

Food was not great. Small seating area for business class

I was pleasantly surprised. I've never flown this airline and the seats were comfy, I couldn't select my seat but luckily got aisle and was able to comfortably sleep the whole trip except when they came around with an in flight free meal, drinks then snack at the end. I'd fly with Aer Lingus again. The only annoying thing is you had to pay for WiFi for different hours of usage but luckily I didn't need it

This was a great flight. I love the way they had general boarding board from the back first by seat row and in general the flight was very comfortable. The seats were actually comfy, and the food served was surprisingly good.

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.

I like Aer Lingus so that is why I’m writing this critique so they can become better. The boarding gate was too small to board properly. Our seats were toward the back of the plane knowing we would be boarding after business class, we moved to that area after business class boarded. An Aer Lingus employee told us we couldn’t stand there. We explained we were the next group to board and wouldn’t even be able to hear when our boarding was called. She didn’t care and was not very professional. The cabin was freezing. I wouldn’t feed my dog the food. We were over an hour late coming into chicago because of weather which can’t be avoided. I asked the crew if they could make an annoucement for before whose final destination is chicago to wait and allow the people with connecting to deplane first. He said there are a lot of people with connecting flights. He said, it doesn’t matter. Well, yes it does. He could have been more considerate of his passengers.

Very pleasant staff, there was some turbulence but the captain was very apologetic and gave notice where possible.

Flight was delayed. But my finances flight with JetBlue a week before same route was extra delayed and then cancelled at 2am when his flight was suppose to take off at 7pm was never provided a hotel or anything. Came back to airport and his rescheduled flight was cancelled again for 2 days later. Was told since it was a weather issue they don’t do refunds. But that’s a lie because I booked him on another airline at the same time and they were able to take off perfectly fine

Flight delayed 4 times on a non-stop from BOS to SFO. Then when landed in SFO had to wait for 30 mins for a gate AT 3:30AM.

Plane was delayed multiple times. I would like to request a refund. Was due to arrive Thursday evening ended up arriving Friday morning.

The seats were roomier than other airplanes I’ve been on.

The security line at JFK was one of the longest I’ve ever experienced - probably 45 minutes. I don’t know if JetBlue has control over it, but it detracted from the overall experience. Entertainment had good options, but the volume control was a bit small to tap on and the screen had a fair amount of interference blips. Clearer picture would have been better.

I liked the entertainment on JetBlue, the service from JFK to JAX was terrible at best

Checking-in in Barbados was excellent, connecting in JFK to JAX was a nightmare, had to wait over 1 hour and 20 minutes to receive my check bag. After receiving my checked bag and going to the gate to check in for my flight to Jax the crew there had no clue. They first told me that I had missed the flight and had to rebooked.. after trying to speak with JetBlue reservations (without luck) I was asked to leave my Phone number for a recall, I did so and my call was returned after 15 hours. I finally looked at the information board and saw the flight that I was originally scheduled for was still at the gate. I alerted an JetBlue employee of my findings and was told to rush to the gate and see if I could still board. The agent at the boarding gate apparently was having a very bad day, after lecturing me on how late I was (which was not a fault of mine) let me on the flight. A VERY BAD EXPERIENCE. I will NEVER fly JetBlue ever in my life again.

I usually dont fly JeTBlue and I dont think I will ever do it again. The flight was delayed fee time, nobody was giving us any info at at the airport, gate changing, the slowest and poorly organized boarding ever, rude staff.. huh

The flight was delayed. I upgraded to more room. I can't imagine how small the regular seats are I haven't upgraded for my return flight yet.

I volunteered to let them put my carry on suitcase in the baggage storage area. But when we landed I was told it was being unloaded IN A DIFFERENT TERMINAL! I had to walk (painful for me) a long way to retrieve my bag and my ride had to move from the waiting area they were in to a totally different one. Not happy.

Very comfortable plane. The food was very good (for airplane food). The crew was great

The legroom was lacking and the entertainment system lacked adequate selection of older films. Modern films are generally not very good.

Perfect airline, super friendly, great service, tasty food. Would fly again.

Everything could have been better. What needed to be wrong with United went wrong

It was good. The seats in economy weren’t bad

Very good. Comfortable and I felt well taken care of from start to finish

We were in premium economy seats that appeared to be locked in plae, No reclining. My aching back.

I don’t understand how they charge as much as they do for such a poor experience

I wish the plane had pod seating for business class. I had a window seat (8K) and I had to climb over the person sitting on the aisle when I needed to get up. Also there is no partition between the seats for privacy when sleeping. The Asian airlines have much nicer business class seating. Their seats are wider for better comfort when sleeping.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Travelling to a place near O'Hare Intl?

Book flights to O'Hare Intl if you plan to visit one of these locations
Oak Brook
Lake Geneva
Elgin
Naperville
Lincolnshire
Wheeling
Schaumburg
Evanston
Oak Park
Itasca
Gurnee
Deerfield
Des Plaines
Saint Joseph
Kankakee
Bridgeview
Tinley Park
Hammond
Glenview
Bolingbrook

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

Information on the airport you'll fly into in Chicago