€349 Find Cheap Flights from Dublin to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dublin to Illinois departing on 12/10. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Dublin to Illinois.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Dublin to Illinois.
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Flight Deals

Best Illinois Flight Deals from Dublin

Cheapest return prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago1 stop€545
St. Louis
St. Louis2 stops€818
Chicago
Chicago1 stop€545
St. Louis
St. Louis2 stops€818

Cheap Flights from Dublin to Illinois

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Dublin to Illinois 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 Dublin to Illinois

Sun, 30 Aug - Sat, 19 Sep
Air Canada Logo
09:50 - 14:36
DUB
-
ORD
34h 46m
1 stop
Air Canada Logo
12:16 - 08:15
ORD
-
DUB
13h 59m
2 stops
€545Air Canada
Tue, 25 Aug - Sun, 30 Aug
Delta Logo
08:55 - 18:01
DUB
-
MDW
15h 06m
2 stops
Delta Logo
18:42 - 10:00
MDW
-
DUB
9h 18m
1 stop
€545Delta
Tue, 25 Aug - Sun, 30 Aug
Multiple Airlines Logo
09:30 - 11:30
DUB
-
ORD
8h 00mdirect
Multiple Airlines Logo
06:49 - 09:35
ORD
-
DUB
20h 46m
1 stop
€546Multiple Airlines
Mon, 31 Aug - Thu, 17 Sep
Air Canada Logo
09:50 - 20:29
DUB
-
ORD
16h 39m
2 stops
Air Canada Logo
15:45 - 08:15
ORD
-
DUB
10h 30m
1 stop
€548Air Canada
Wed, 23 Sep - Fri, 2 Oct
United Airlines Logo
11:35 - 13:40
DUB
-
ORD
8h 05mdirect
United Airlines Logo
20:20 - 09:45
ORD
-
DUB
7h 25mdirect
€549United Airlines
Wed, 2 Sep - Wed, 9 Sep
United Airlines Logo
11:35 - 13:40
DUB
-
ORD
8h 05mdirect
United Airlines Logo
20:20 - 09:45
ORD
-
DUB
7h 25mdirect
€550United Airlines
Sat, 31 Oct - Mon, 2 Nov
Aer Lingus Logo
15:50 - 19:25
DUB
-
ORD
8h 35mdirect
Aer Lingus Logo
17:10 - 09:50
ORD
-
DUB
10h 40m
1 stop
€551Aer Lingus
Thu, 3 Dec - Sun, 6 Dec
American Airlines Logo
11:30 - 20:21
DUB
-
STL
14h 51m
1 stop
American Airlines Logo
06:00 - 08:30
STL
-
DUB
20h 30m
1 stop
€854American Airlines
Thu, 3 Dec - Sun, 6 Dec
American Airlines Logo
11:30 - 10:17
DUB
-
STL
28h 47m
1 stop
American Airlines Logo
06:00 - 08:30
STL
-
DUB
20h 30m
1 stop
€854American Airlines
Mon, 3 Aug - Mon, 10 Aug
Finnair Logo
09:30 - 00:16
DUB
-
STL
20h 46m
1 stop
Finnair Logo
16:54 - 11:50
STL
-
DUB
12h 56m
1 stop
€910Finnair
Booking Insights

KAYAK's insights & trends for Dublin to Illinois flights

Get data-powered insights and trends into flights from Dublin to Illinois to help you find the cheapest flights, the best time to fly, and much more.

How much is a return flight from Dublin to Illinois?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Dublin to Illinois departing in August.

What is the cheapest Dublin to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Dublin found in the last 72 hours was to Chicago, at €512 return. The most popular route is from Dublin (DUB) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was €512.

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

The average price for all round-trip flights from Dublin to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally in the evening, when retur flights cost €612 on average. Morning departures are around 16% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is €781.

Can I save money by flying with a stopover from Dublin to Illinois?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at €638 on average.

What is the cheapest month to fly from Dublin to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Dublin to Illinois, 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 from Dublin to Illinois is September, when tickets cost €238 (return) on average. On the other hand, the most expensive months are July and April, when the average cost of return tickets is €550 and €417 respectively.

What’s the cheapest day of the week to fly from Dublin to Illinois?

The average price of all round-trip flights from Dublin to Illinois clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Illinois on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Dublin to Illinois. For your return ticket, we recommend flying on a Thursday and avoiding Wednesdays for the best deals.

How far in advance should I book a flight from Dublin to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Dublin to Illinois, 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 on a flight from Dublin to Illinois, you should book around 3 weeks before departure, which saves you about 32% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight€349
Best time to beat the crowds (4% less expensive on average)
Most popular time to fly and prices are also 9% lower on average.
Flight from Dublin to St. Louis

Flights from Dublin to Illinois: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Dublin to Illinois 
JohannaFlew with Aer Lingus
DUB
-
ORD
Feb 2026
Are Ling’s was great, and boards from the back of the plane, which made boarding way less chaotic and much quicker.
Verified travelerFlew with Iberia
DUB
-
ORD
Sept 2024
Taking the coach bus to Dublin from Castlebar to departures was affordable and easy.
ConnerFlew with Aer Lingus
DUB
-
ORD
Sept 2024
You need almost 2 hours to be sure you will clear US pre clearance
Verified travelerFlew with Lufthansa
DUB
-
ORD
Aug 2024
Give yourself enough time to go through US Customs in Dublin.

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Dublin to Illinois?

    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 from Dublin to Illinois.

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

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

  • What is the Hacker Fare option on flights from Dublin to Illinois?

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

    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 from Dublin to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines flying from Dublin to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Dublin to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dublin to Illinois? 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 1415 reviews
7.4Comfort
6.9Entertainment
7.7Boarding
6.7Food
8.2Crew
Airline reviews

The seats are very uncomfortable. They never have tomato juice. Usually late

4.0 OkayAnonymous, Jun 2026
LAX - HEL
Read more Finnair reviews

The seats are very uncomfortable. They never have tomato juice. Usually late

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

Finnair was not able to get our luggage on a connecting flight and there was a substantial delay of two days to obtain our lugguage. They did not communicate well, and we had to travel a significant distance to finally get our luggage. It has been a very negative experience.

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

Positive: It was refreshingly easy and polite check-in and boarding staff. Flight was on time and Helsinki is a very well-signposted airport. Shopping was nice as well. Flight was not full and I had lots of space in economy. Flight was perfectly on time. Negative: Food and drink not very good, but that it is normal on any airline. Didn't expect anything else.

Business seating is soooo uncomfortable. You can sit straight up or lay down. You need pillows behind you because the back doesn’t lay down. Those are need to “prop” you up. The chair has no padding whatsoever. Food was gross. I’ve eaten on Finnair before and the food was exceptional. This time it gave 2 people in our party diarrhea. It was the chicken dish. I took 2 bites and didn’t eat anything more. The flight attendants were nice. You needed an additional lounge in Terminal D at DFW Airport. After waiting 40 minutes to enter, we finally gave up and went to a bar across from the club doors. I’m unsure if I’ll ever book a Finnair flight again.

It was a good flight, very comfortable seats for sleeping in business class. Probably the most comfortable business class seat I've ever had (20+ times in business class on various airlines). Service was good, but the only downside is my screen didn't work and it had to be reset multiple times to get it to shut off. I had to block my eyes because the screen was white almost the entire flight and I wore an eye mask when I slept. But when eating and reading in my seat, my eyes hurt because the only way to turn the screen off was reset it and the screen would only be off for a few minutes at a time.

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

Very easy ! Use the kiosk and bag drop and right to security within 10 min

Prefer not to have an almost 3 hour delay with useless communication that wasn't accurate.

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

I flew from Barcelona to Chicago on UA yesterday. The flight was on time, the pilots did a great job and the flight attendants were super nice. All of them. Also food was good, and the drinks, including wine were served a few times during our flight. I highly recommend this airline.

Boarded early, left early, arrived 40 mins early! A win win for me!

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

This flight is a quick way to get to Chicago, but a bit expensive.

The clerk at check in for my bags was very rude. My credit card was hacked during my vacation and she told me it was not possible to pay in cash for my bag. “You bought the cheapest ticket, you should have bought a ticket that included a bag. If you cannot pay with a credit card, we will not let you on this flight”. She spoke to her supervisor and then told me , I could ask other passengers, if they would use their credit card to check my bag. I had to beg 5 different people, till one agreed to use their credit card. I payed them cash of course. This was a very stressful and humiliating experience for me. I strongly suggest you build in some kind of provision for travelers who got robbed.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Everything was great!! I had no problems!! I would fly Aer Lingus again! 🥰

From Rome to Dublin if you want any refreshments you have to pay for them, Not used to this as we typically get soft drinks and a little snack on a 3hour flight in the US.

Boarding was fine, difficult to understand the guy over the speaker though so we were unsure when exactly to board until they updated the monitor by the gate. Flight itself was fine, nice flight attendants, seats were comfortable enough, good selection of entertainment on the screens. Other airlines at a similar price point have included wifi though, at a minimum messaging, for free, so that was a little disappointing to not have that. But otherwise fine. Food was pretty decent, nice hot meal, good drink selection, nice snacks. Bathrooms were ok, could've been cleaned a little more often, but they were never bad.

Vegetarian food option was very poor. Effectively, overcooked rice ("risotto"). Zero protein which is always disappointing with no vegetables and poorly seasoned. Basically had lots of carbs on 6-hour flight. Not acceptable for business class in 2026. Flight was otherwise very good.

Small plane. Tight seating . What can one say except that it was fast!

Flight crew was very cold and stood around a lot talking to each other.

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.

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

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.

On a four hour delayed flight now on seats back end of the plane instead front-

I love the e fact that the staff communicated swiftly when my flight was delayed and gate number changed

We had a mechanical delay which made us 90 minutes late (9:30 PM) then land and put into the penalty box because a plane was in our gate? What the hell! We should get priority.Damn American.

The seats were extremely cramped, with very little legroom or personal space. There was no room left in the overhead bins for a backpack, and the space under the seat in front was so limited that I could barely fit my bag underneath. Overall, the seating arrangement felt very uncomfortable and overcrowded.

weather delay of almost 2 hours then we landed and our gate wasn't available so we waited another 30 min

Delayed flight more than I hour. When boarding we spent some additional time on the plane before takeoff ....

The flight was delayed significantly and we sat on runway after landing for awhile. Best thing was the flight attendant, Jenny, in first class, who was very professional and attentive. She was excellent - the rest of the flight was not.

The flight attendants were extremely sourly and borderline rude. I did not feel appreciated as an AA customer once.

This was my first flight on Aer Lingus and it was great. The plane wasn't full so I could move to a seat with extra room. The food was pretty good for airline food and the staff was nice and attentive. I enjoyed the media provided during my 10 hour flight. We arrived home early and it's always good to be home!

The flight from LA to Chicago was smooth and service was very good overall.

The Mario was so helpful and provided amazing customer service however l have being waiting for a callback for almost a week now and have not heard anything further after l informed them l wanted to change my date of traveling because of my hospital appointment even send them proof and l was unable to use manag your booking on their website is a bit frustrating and l would appreciate an update on My request as soon as possible. And have called them times without numbers no response

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.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Everything you need to know for your flight from Dublin to Illinois

Information on your arrival and departure airports