$335 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 6/18. 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

jue., jun. 18 - sáb., jun. 27
Finnair Logo
9:30 am - 11:30 am
DUB
-
ORD
8h 00mnonstop
Finnair Logo
10:20 pm - 11:50 am
ORD
-
DUB
7h 30mnonstop
$601Finnair
sáb., may. 9 - dom., may. 10
Finnair Logo
9:30 am - 11:30 am
DUB
-
ORD
8h 00mnonstop
Finnair Logo
10:25 pm - 11:50 am
ORD
-
DUB
7h 25mnonstop
$602Finnair
mar., sep. 8 - mar., sep. 22
Icelandair Logo
2:15 pm - 9:25 pm
DUB
-
ORD
13h 10m
1 stop
Icelandair Logo
7:25 pm - 11:05 am
ORD
-
DUB
9h 40m
1 stop
$607Icelandair
mar., sep. 22 - jue., nov. 5
Icelandair Logo
2:15 pm - 6:15 pm
DUB
-
ORD
10h 00m
1 stop
Icelandair Logo
6:30 pm - 10:15 am
ORD
-
DUB
9h 45m
1 stop
$611Icelandair
jue., may. 28 - jue., jun. 4
Multiple Airlines Logo
7:50 pm - 6:38 pm
DUB
-
ORD
28h 48m
2 stops
Multiple Airlines Logo
12:59 pm - 6:20 pm
ORD
-
DUB
23h 21m
2 stops
$616Multiple Airlines
vie., may. 22 - mié., may. 27
Multiple Airlines Logo
9:15 pm - 3:55 pm
SNN
-
ORD
24h 40m
1 stop
Multiple Airlines Logo
9:15 pm - 8:35 pm
ORD
-
SNN
17h 20m
1 stop
$663Multiple Airlines
vie., may. 15 - lun., may. 25
Delta Logo
5:55 am - 6:33 pm
DUB
-
MDW
18h 38m
2 stops
Delta Logo
9:23 am - 9:15 am
MDW
-
DUB
17h 52m
2 stops
$668Delta
vie., may. 15 - lun., may. 25
Delta Logo
5:55 am - 6:33 pm
DUB
-
MDW
18h 38m
2 stops
Delta Logo
9:23 am - 9:15 am
MDW
-
DUB
17h 52m
2 stops
$669Delta
mié., jun. 10 - mié., jun. 17
Air France Logo
12:00 pm - 6:18 pm
DUB
-
MDW
12h 18m
1 stop
Air France Logo
11:05 am - 8:45 am
MDW
-
DUB
15h 40m
1 stop
$672Air France
vie., jun. 12 - vie., jun. 19
Air France Logo
1:05 pm - 3:40 pm
SNN
-
MDW
32h 35m
2 stops
Air France Logo
1:49 pm - 11:10 am
MDW
-
SNN
15h 21m
2 stops
$839Air France
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 Wednesday where round-trip tickets can be as cheap as $682. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $863 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 $467 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 $779 and $752 respectively. For one-way flights, the best month to travel is September with an average price of $467.

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 morning, when round-trip flights cost $787 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 $857.

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 $709 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 $152.

Good to know

Low seasonJanuary
Best time to beat the crowds but there is an average 2% 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 $760. The cheapest price found on KAYAK in the last 2 weeks cost $560 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 $628 or less one-way and $709 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 airline 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.
7.3
Aer LingusOverall score based on 1536 reviews
8.1Crew
6.6Food
7.2Comfort
7.4Boarding
7.0Entertainment
Airline reviews

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

10.0 ExcellentAnthon, Apr 2026
DUB - BOS
Read more Aer Lingus reviews

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

OK overall. Flight was delayed Crew on flight was good

On time, only a little turbulence, very competent and caring attendants. Clear information.

Late late late. Delayed and arrived an hour late for a 1 hour 45 minute connection. Every time. Poor record for this company. I try to fly any other carrier first.

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.

The crew was friendly. The plane was comfortable. In-flight wifi didn't work well at all. The ride was quite turbulent but understandable given the weather.

My issue is with the SkyWest terminal. The flight was not listed on the main airport flight screen list, and I had to do a Google search to locate the terminal and gate. We had to ask several airport employees where to locate the phantom gate. The airport did not provide adequate signage and was confusing. When we arrived, there was one vendor providing services that quickly closed, leaving zero options for food and drink while we waited hours for our delayed flight. The crew that assisted with check-in and boarding was VERY friendly.

Economy seats a bit small but other than that it was all good.

No complimentary drinks or snacks offered on a 2 hour flight was disappointing but everything else went well

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.

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.