$317 Find Cheap Flights from Ireland to Chicago

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Chicago departing on 4/28. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago

 
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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Flight Deals

Cheap Flights from Ireland to Chicago

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ireland to Chicago 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 Chicago

Sun, May 3 - Sat, May 9
JetBlue Logo
10:40 am - 9:36 pm
DUB
-
ORD
16h 56m
1 stop
JetBlue Logo
6:00 am - 8:20 am
ORD
-
DUB
20h 20m
1 stop
$465JetBlue
Thu, Apr 23 - Wed, Apr 29
JetBlue Logo
10:40 am - 9:39 pm
DUB
-
ORD
16h 59m
1 stop
JetBlue Logo
8:31 am - 9:00 am
ORD
-
DUB
18h 29m
1 stop
$473JetBlue
Wed, May 13 - Tue, May 26
JetBlue Logo
10:40 am - 9:36 pm
DUB
-
ORD
16h 56m
1 stop
JetBlue Logo
8:50 am - 8:20 am
ORD
-
DUB
17h 30m
1 stop
$496JetBlue
Tue, Jun 2 - Wed, Aug 26
Scandinavian Airlines Logo
7:05 pm - 4:10 pm
DUB
-
ORD
27h 05m
1 stop
Scandinavian Airlines Logo
7:15 pm - 6:20 pm
ORD
-
DUB
17h 05m
1 stop
$508Scandinavian Airlines
Fri, Apr 10 - Sat, Apr 18
Icelandair Logo
12:15 pm - 6:15 pm
DUB
-
ORD
12h 00m
1 stop
Icelandair Logo
7:25 pm - 11:05 am
ORD
-
DUB
9h 40m
1 stop
$547Icelandair
Wed, Apr 15 - Sun, Apr 26
Icelandair Logo
12:15 pm - 6:15 pm
DUB
-
ORD
12h 00m
1 stop
Icelandair Logo
7:25 pm - 1:15 pm
ORD
-
DUB
11h 50m
1 stop
$558Icelandair
Mon, Apr 13 - Sun, Apr 19
Delta Logo
6:15 am - 2:30 pm
ORK
-
ORD
14h 15m
1 stop
Delta Logo
5:10 pm - 2:40 pm
ORD
-
ORK
15h 30m
1 stop
$649Delta
Mon, Apr 13 - Sun, Apr 19
Delta Logo
6:15 am - 2:30 pm
ORK
-
ORD
14h 15m
1 stop
Delta Logo
5:10 pm - 2:40 pm
ORD
-
ORK
15h 30m
1 stop
$651Delta
Thu, Apr 2 - Tue, Apr 7
KLM Logo
5:10 pm - 2:15 pm
ORK
-
ORD
27h 05m
1 stop
KLM Logo
5:10 pm - 2:40 pm
ORD
-
ORK
15h 30m
1 stop
$658KLM
Thu, May 7 - Thu, May 14
KLM Logo
10:00 am - 5:56 pm
DUB
-
MDW
13h 56m
1 stop
KLM Logo
1:22 pm - 9:15 am
MDW
-
DUB
13h 53m
1 stop
$664KLM
Booking Insights

KAYAK's insights & trends for flights to Chicago

Get data-powered insights and trends for flights to Chicago 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 clicked on KAYAK for each day over the last 12 months.

Based on KAYAK data, the cheapest day to fly to Chicago is Sunday where round-trip tickets can be as cheap as $761. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $864 on average.

What is the cheapest month to fly to Chicago?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Chicago, 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 is September, where tickets cost $469 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 $731 and $725 respectively. For one-way flights, the best month to travel is September with an average price of $469.

What is the cheapest time of day to fly to Chicago?

The average price for all round-trip flights to Chicago 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 is generally in the evening, when round-trip flights cost $780 on average. The most expensive time of day to fly to Chicago is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $860.

What is a good deal for flights to Chicago?

If you’re looking for cheap airfare to Chicago, 25% of our users found tickets to Chicago for the following prices or less: From Dublin $701 round-trip.

How far in advance should I book a flight to Chicago?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Chicago, 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 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Which is the cheapest airport to fly into in Chicago?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Chicago is Chicago Greater Rockford Airport (RFD), with an average flight price of $151.

Good to know

Low seasonJanuary
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly with an average 1% increase in price.

FAQs - booking Chicago flights

  • Which Chicago airport is closest to central Chicago?

    There are 3 major airports in Chicago. The nearest airport from Chicago city center is Chicago Midway Airport (9 miles), followed by Chicago O'Hare Airport (16 miles) and Chicago Greater Rockford (79 miles).

  • How much is a flight to Chicago?

    On average, a flight to Chicago costs $733. The cheapest price found on KAYAK in the last 2 weeks cost $481 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 travelers 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 round-trip 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 a cheap flight? 25% of our users found flights on this route for $545 or less one-way and $701 or less round-trip.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Chicago flight deals.

Reviews of the top airlines flying from Ireland to Chicago

 
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 Chicago? 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 9431 reviews
8.1Crew
7.3Comfort
6.6Food
7.1Entertainment
7.7Boarding
Airline reviews

Would've been great if Lufthansa union cockpit pilots didn't strike for 2 days and caused a chaos to my returning plans to USA, and then after rebooking a flight 2 days later tge plane departed 35 min later. So I did not have a good experience.

6.0 GoodAnonymous, Mar 2026
FRA - ORD
Read more United Airlines reviews

Would've been great if Lufthansa union cockpit pilots didn't strike for 2 days and caused a chaos to my returning plans to USA, and then after rebooking a flight 2 days later tge plane departed 35 min later. So I did not have a good experience.

They never clean the toilet, and the food is worse

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Chargers didn’t work, no entertainment and we had to wait for taxiing for easily 40 minutes after arriving early. Bags were late too!

No real complaints. The in flight food was much better than I expected. The in flight entertainment was excellent.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Horrible Flight significantly delayed. Not due to united issue. But trying to rebook connection flight and get information about overnight accommodation was difficult. Agent did not seem to care or have any interest to help.

United Airlines is my preferred airlines and I am thankful for Gary who also help support me on the phone to switch my flight literally last min.

This Japanese airline provides great service and very helpful in assisting their passengers.

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

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.

I love the direct flights. It saves a lot of hassle and allows immigration and customs in Ireland, making arrival much easier.

Great. Has a problem with DOB. Fixed 4 us. Led to a 5 hour earlier flight to London!

One of the best flight experiences I've have had in along time. Would fly with them again.

So, the trip from Dublin to LA did not really happen because the flight took off before we could finish the transfer.

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

Like - the crew were nice Dislike - sitting on the tarmac for long periods after boarding and landing.

I was not admitted to the flight!!! i need a refund for this.

It’s my new favourite airline! Everything was smooth and relaxed!

One of the best flights I've been on in a while. Very genuinely friendly staff. Courteous, kind, respectful. On a past flight (not Aer Lingus) I remember being woken up rudely to put my seat forward. Like a child being berated for something. Oddly jarring experience when someone could just tap you gently on the shoulder and gesture kindly. But I noticed the Aer Lingus staff were incredibly patient with everyone on the plane. It's the holiday season and I noticed a lot more elderly customers on the plane than I typically see flying, and the staff went above and beyond with helping accommodate people. Service throughout the flight was flawless. They came through offering water, and picking up garbage at perfect intervals. Seemed like this flight, everyone was on point. And the flight landed early on top of that

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
Saint Joseph
Hammond
Portage
Lansing
Valparaiso
Chesterton
Schererville
Munster
Porter
Monticello
Saint John
Griffith

Everything you need to know for your flight to Chicago

Cabin class types available on flights to Chicago

Cabin classes available on flights to Chicago. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.