€298 Find Cheap Flights from Dublin to Illinois – Compare and Save

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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?

Flight prices are below average for this route right now.

Flights to Illinois from Dublin usually cost between €469 and €660 in January.
The lowest price found in the past 5 days was €462 on Icelandair (22 Jan–30 Jan).

What is the cheapest Dublin to Illinois flight route?

The cheapest ticket to Illinois from Dublin found in the last 5 days was to Chicago, at €494 return. The most popular route is from Dublin (DUB) to Chicago O'Hare Intl Airport (ORD), and the cheapest return airline ticket found on this route in the last 5 days was €494.

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

The cheapest time of day to fly to Illinois is generally in the evening, when retur flights cost €638 on average. Morning departures are around 17% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is €743.

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

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 €612 on average.

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

The cheapest month for flights from Dublin to Illinois is September, when tickets cost €533 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of return tickets is €755 and €750 respectively.

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

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 Monday and avoiding Wednesdays for the best deals.

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

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 24% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low season

February

Cheapest flight

€298
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly and prices are also 6% lower on average.
Flight from Dublin to Chicago O'Hare Airport

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

Insights shared by verified travellers who flew the route from Dublin to Illinois 
Verified travelerFlew with Aer Lingus-Sept 2026
Get there early enough to be able to relax and shop a bit
JohannaFlew with Aer Lingus-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-Sept 2024
Taking the coach bus to Dublin from Castlebar to departures was affordable and easy.
ConnerFlew with Aer Lingus-Sept 2024
You need almost 2 hours to be sure you will clear US pre clearance
Verified travelerFlew with Lufthansa-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.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Dublin to the following destinations at these prices or less: Chicago €505 one-way - €637 round-trip

Reviews of the top 5 airlines flying from Dublin to Illinois

 
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 1410 reviews
6.9Entertainment
7.6Boarding
7.4Comfort
6.7Food
8.2Crew
Airline reviews

I love this company for comfort, cleanliness on board the liner, excellent food, very good selection of films in Russian. Looked with pleasure. And the main friendly conductors who work smoothly and with the soul.

10.0 ExcellentOlga, Oct 2026
Read more Finnair reviews

I love this company for comfort, cleanliness on board the liner, excellent food, very good selection of films in Russian. Looked with pleasure. And the main friendly conductors who work smoothly and with the soul.

American Airlines told me that I have 3 other flights in which I did not book! They told me to check with you kayak - cheap flights, my travel agent. Upon calling the person told me “ not to worry “ about these flights in my name?!?!? I never booked any of these other flights. I will not ever use this site again because of putting flights in my name that I didn’t book.

Business class should have free wi-fi. Food was horrible

Will never fly American Airlines business class again. Medicore service and very old aircraft.

Staff went above and beyond with their care for us. Flight attendants were very attentive to our needs. Food seemed too rich and too salty. Flight was fine, even with turbulence at points.

It all went very smoothly, love the new planes and cabin crew upbeat and friendly Food ok, but that is the hardest part of it all

Finnair was ok. But some things were pretty bad: 1. Crew was not friendly, especially a crew member named, Maria. She woke me up while I was deep asleep by force just to let me know that 2 people can’t be on the same seat (my toddler and me) for sleeping. 2. There was no vegetarian option in the menu so I had to eat bread for one meal 3. They didn’t have an option for child meal

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

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

Still some confusion about my baggage which was disconcerting. It was nice that there was extra space on the flight for comfort reasons. Staff very friendly

The plane from Venice to Dublin ran out of food. They did not restock the plane in Venice.

The crew was first rate. They allowed me to switch my middle seat to an isle seat and it made my flight home so much more comfortable.

Very comfortable flight. Great service, food options, and entertainment options. With Wi-Fi!

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.

We left nearly 3 hours late...so that was not a good experience. We boarded and then ended up about 1 hour stuck at the gate. Not a good experience.

I appreciate how quickly and kindly the people at the gate at DCA accommodated several of us who wanted to switch from the 6pm flight to the 5pm flight at the last minute. The flight crew was helpful to us too (dealing with luggage).

Went from a plane with free internet to a plane with paid internet. The entertainment screens didn’t work. Crammed in the back and the crew hit my knee with the cart really hard - it hurt. No apologies. I’m still limping today.

Waited on tarmac to take off for approximately 15-25 minutes. When landing, the taxi to our gate took a similar amount of time. This happened on both of my United flights.

Fine except from Chicago to moline three different gate changes and flight times

When booking, the connection times seem fine. But in reality, my two connections were cut short by the first leg being delayed due to issues at the destination (too much traffic going into SFO, ORD) and it became extremely stressful.

Promised internet. Tried for nine hours to log in, no way. I tried the free option, I tried the paid option, I tried restarting my phone.. several times! Very aggrevating as I was trying to keep up with an emregency medial issue with my dad, but could not because the promised service was not available.

I had bad experience with United airline. No live rep, they only have AI that respond to customers concern

Slight delay but not bad. UA app worked well! Got regular updates of gate changes, etc. Don't have any complaints.

If other people in flight, followed instructions and were much cleaner.

Excellent crew, food and service. Boarding via bus is always a pain but overall really good

The plane needs upgrading, the seats are uncomfortable, we are a family of three and they split us and did nothing to group us together, and the food is horrible compared to other airlines bu

Boarding was odd. Gates switched and had to take a bus to the plane. Luggage got lost. Still waiting on one bag. Flight itself was very nice!

I had a great experience , crew was great and enjoyed the entertainment options I will be booking my next International trip with them .

The flight was decent. I purchased my flight through Iberia, traveling with my elderly mother with mobility issues. I try to pay for luggage and seats online prior but Iberia website directs me to AA website. AA airlines website does not recognize the record locator. My mother and I are separated and each get a middle seat. She is seated the furthest away from a bathroom. I had to sit behind her to see her wave at me to use the bathroom. Lights out on the flight and I could not see her wave and she is not tech savvy to push an attendant button even though I showed her how. The attention to this detail puts AA at the bottom of my list when traveling with my elderly mother. Bad execution and handling when servicing those with extra needs due to mobility. I could not get her to the bathroom because she’s slow and she had to wait for me to get up from my middle seat then move her out of her middle seat. She had an accident which required that I hel her clean up before taking her back to her seat.

Horrible see last review they lost my bag had to sprint to gate no inflight wifi

They cancelled our NON_STOP flight from London to Chicago 22 hours before our flight. After a 2 hour phone call, they rescheduled us from London to Barcelona (Wrong way to USA) 2 hour lay over, and then to Chicago for a 9 1/2 hour flight at 6 am. Ruined 2 days of our vacation. We will not fly British Airways again.

Mediocre. I didntneat for more than 9h. Pregnant and diabetic. 0 care from The crew.

Flight was delayed by well over an hour. Communication was terrible.

How to get an aisle seat without paying extra? The young lady next to me was assigned the seat.

I'm a nervous, autistic adult. The staff were very friendly and answered my questions and came by at regular intervals to check everyone's comfort. They even resolved a fight between two couples in front of me!

roomiest flight in economy I've taken in years. Excellent experience!

I was booked to travel from Dallas to Nairobi via Chicago and Brussels and had been issued boarding passes for all three segments of my journey. At the boarding gate in Dallas, I was required to check my carry-on luggage due to limited cabin space. Despite my attempts to explain that I was traveling internationally and would not have access to the bag during transit, my concerns were not considered. I also informed the staff that I did not have a padlock to secure the luggage, but this was disregarded. Consequently, I had to hastily transfer essential items from my carry-on into my handbag. To my surprise, upon arriving at Chicago Airport, I observed numerous international travelers boarding with cabin bags that were significantly larger than mine. This experience left me extremely disappointed and led me to decide against using United Airlines for future international travel, a sentiment I have also shared with friends and family. Unfortunately, the onboard experience on the Chicago to Brussels flight further reinforced my dissatisfaction. The cabin crew appeared disengaged, indifferent, and lacking in attentiveness, resulting in a service experience that fell well below my expectations.

I want to highlight the crew members and their excellent work and professionalism. They work hard to make a long trip the most comfortable as possible, the food and drinks they offer are pretty good. And they are always asking if you need something else. I have had experiences with other airlines where you have to basically beg for a bottle of water. This is not the case. Highly recommended!!!

the blanket was great and pillow helped. really need a toothpick packed with meals

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.

Love the little chocolate bars, and consumer rights in EU regarding stepped refunds when flights are delayed.

Staff was rude in business class. Luggage was damaged and nothing was done about it airlines.

We were helped whenever needed and had a pleasant flight.

More options for your flight from Dublin to Illinois

Complete your trip to Illinois with a hotel stay or car hire