$387 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 2/23. 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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Everything you should know

Cheapest round-trip
$405
Typical prices: $533-$703
Scandinavian Airlines
Sun 3/1Mon 3/9
DUB - ORD • 1 stop
Cheapest non-stop
$440
Typical prices: $557-$797
Finnair
Fri 5/15Mon 5/25
DUB - ORD • Non-stop
Top airlines
Aer Lingus
Most flights • 7 per week
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
November
Cheapest • 21% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Chicago!
Flight Deals
Booking Insights
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, Mar 1 - Mon, Mar 9
Scandinavian Airlines Logo
7:05 pm - 4:45 pm
DUB
-
ORD
27h 40m
1 stop
Scandinavian Airlines Logo
8:20 pm - 6:20 pm
ORD
-
DUB
17h 00m
1 stop
$405Scandinavian Airlines
Sun, Mar 1 - Wed, Mar 11
Scandinavian Airlines Logo
7:05 pm - 4:45 pm
DUB
-
ORD
27h 40m
1 stop
Scandinavian Airlines Logo
8:20 pm - 6:20 pm
ORD
-
DUB
17h 00m
1 stop
$432Scandinavian Airlines
Fri, May 15 - Mon, May 25
Finnair Logo
9:30 am - 11:30 am
DUB
-
ORD
8h 00mnonstop
Finnair Logo
10:25 pm - 11:50 am
ORD
-
DUB
7h 25mnonstop
$440Finnair
Wed, May 13 - Tue, May 26
Finnair Logo
9:30 am - 11:30 am
DUB
-
ORD
8h 00mnonstop
Finnair Logo
10:25 pm - 11:50 am
ORD
-
DUB
7h 25mnonstop
$444Finnair
Wed, May 13 - Tue, May 26
Multiple Airlines Logo
8:35 am - 2:55 pm
DUB
-
ORD
12h 20m
1 stop
Multiple Airlines Logo
10:25 pm - 11:50 am
ORD
-
DUB
7h 25mnonstop
$453Multiple Airlines
Mon, Feb 9 - Mon, Feb 16
Delta Logo
5:55 am - 5:55 pm
DUB
-
MDW
18h 00m
2 stops
Delta Logo
1:26 pm - 3:45 pm
MDW
-
DUB
20h 19m
2 stops
$539Delta
Fri, Feb 13 - Mon, Feb 16
Delta Logo
5:55 am - 6:40 pm
DUB
-
MDW
18h 45m
2 stops
Delta Logo
1:26 pm - 3:45 pm
MDW
-
DUB
20h 19m
2 stops
$540Delta
Sun, Feb 22 - Wed, Mar 4
KLM Logo
9:45 am - 6:40 pm
DUB
-
MDW
14h 55m
1 stop
KLM Logo
12:45 pm - 7:45 am
MDW
-
DUB
13h 00m
1 stop
$551KLM
Mon, Apr 13 - Sun, Apr 19
Multiple Airlines Logo
6:15 am - 2:30 pm
ORK
-
ORD
14h 15m
1 stop
Multiple Airlines Logo
5:10 pm - 2:40 pm
ORD
-
ORK
15h 30m
1 stop
$589Multiple Airlines
Mon, Apr 13 - Sun, Apr 19
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
$594KLM
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 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 November, where tickets cost $472 on average for one-way flights. On the other hand, the most expensive months are July and August, where the average cost of tickets from Ireland is $723 and $685 respectively. For return trips, the best month to travel is November with an average price of $472.

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 $528 one-way - $698 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 0 weeks before departure. For the absolute cheapest price, our data suggests you should book 31 days 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, with an average flight price of $138.

Good to know

Low seasonJanuary
Cheapest flight$387
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Dublin to Chicago

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 $762. The cheapest price found on KAYAK in the last 2 weeks cost $397 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 Sunday where tickets can be as cheap as $680. On the other hand, the most expensive day to fly is Thursday, where prices are $839 on average.

  • 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.

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

    The cheapest time of day to fly to Chicago is generally in the morning, when flights cost $766 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 $827.

Top tips for finding cheap flights to Chicago

  • Looking for a cheap flight? 25% of our users found flights on this route for $528 or less one-way and $698 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 9212 reviews
8.1Crew
7.3Comfort
7.1Entertainment
6.6Food
7.7Boarding
Airline reviews

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

10.0 ExcellentAnonymous, Jan 2026
NRT - ORD
Read more United Airlines reviews

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.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

I so appreciate the crew members on each flight of United. They are outstanding.

Reliable, nice crew, I fly often on that flight and I like it all.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

The staff was nice, however boarding taking 2 hours. That’s insane. Overall very bad experience, a lot of turbulence and when landed in Chicago was horrible. I don’t think I’ll flight with UA again.

An international flight on an apron is pretty unusual in my 40 years of traveling. Departure delay. Luggage despite over an hour connection did not make it to the flight. Actually still in Germany. My luggage was not moved until I reached my final destination despite knowing it to be left in Germany upon my arrival in Chicago. The service left me a little off, both going and returning from Europe. Light on in the cabin even during a night flight and lots of traffic no matter what. Maybe passengers want more service? As a frequent traveler i just want to be able to sleep, the food will be better at the destination anyway. So since the cabin crew woke me up I asked for a cocktail, I did not get the best response although sitting in row 20 premium economy. I usually fly premium economy or business and my 2 flight to Europe in 2025 with United both had luggage delays and other minor issues. American flights to Australia, Canada and Europe went smoothly and Premium plus feels very much like business light. Is United Club becoming a waste and Silver/Gold levels another waste??

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

Seats are small, but comfortable and more space around you, so for a normal person the seats are perfect. If you are a big and fat individual, I would not think the seats are comfortable. All else was good and normal. Lots of movies to watch.

Customer service was excellent! The app was terrible, tried several times to check in without success! But the young lady that checked us in was absolutely terrific and helpful.

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

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
Griffith
Saint John

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.