$400 Find Cheap Flights from Buenos Aires to Illinois - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Buenos Aires to Illinois departing on 9/17. 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.
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Book Cheap Buenos Aires to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Buenos Aires 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 round-trip flight deals from Buenos Aires to Illinois

Sat, Aug 29 - Mon, Sep 14
Arajet Logo
2:45 am - 10:10 pm
EZE
-
ORD
21h 25m
1 stop
Arajet Logo
5:30 am - 12:05 am
ORD
-
EZE
16h 35m
1 stop
$699Arajet
Fri, Oct 16 - Mon, Oct 26
Arajet Logo
9:15 pm - 11:12 am
EZE
-
ORD
15h 57m
1 stop
Arajet Logo
4:30 am - 12:05 am
ORD
-
EZE
17h 35m
1 stop
$722Arajet
Fri, Oct 16 - Sun, Nov 1
Arajet Logo
9:15 pm - 11:12 am
EZE
-
ORD
15h 57m
1 stop
Arajet Logo
3:20 am - 12:05 am
ORD
-
EZE
17h 45m
1 stop
$730Arajet
Sat, Sep 5 - Mon, Oct 19
Multiple Airlines Logo
1:45 pm - 10:10 pm
EZE
-
ORD
34h 25m
2 stops
Multiple Airlines Logo
5:30 am - 12:05 am
ORD
-
EZE
16h 35m
1 stop
$770Multiple Airlines
Tue, Sep 15 - Mon, Sep 21
Multiple Airlines Logo
12:50 pm - 9:20 pm
AEP
-
ORD
34h 30m
2 stops
Multiple Airlines Logo
1:40 am - 5:40 am
ORD
-
AEP
26h 00m
3 stops
$913Multiple Airlines
Tue, Aug 18 - Sat, Aug 29
Delta Logo
8:10 pm - 9:59 am
EZE
-
MDW
15h 49m
1 stop
Delta Logo
10:56 am - 9:45 am
MDW
-
EZE
20h 49m
1 stop
$983Delta
Tue, Aug 11 - Thu, Aug 20
Delta Logo
8:05 pm - 2:09 pm
AEP
-
ORD
20h 04m
2 stops
Delta Logo
11:23 am - 7:40 am
ORD
-
AEP
18h 17m
2 stops
$983Delta
Tue, Sep 15 - Tue, Sep 22
Avianca Logo
7:00 am - 9:20 pm
AEP
-
ORD
16h 20m
1 stop
Avianca Logo
11:20 pm - 5:40 am
ORD
-
AEP
28h 20m
1 stop
$988Avianca
Wed, Aug 12 - Wed, Aug 19
American Airlines Logo
10:30 pm - 10:45 am
EZE
-
STL
14h 15m
1 stop
American Airlines Logo
11:35 am - 8:45 am
STL
-
EZE
19h 10m
1 stop
$1,001American Airlines
Wed, Aug 12 - Wed, Aug 19
American Airlines Logo
10:30 pm - 1:02 pm
EZE
-
STL
16h 32m
2 stops
American Airlines Logo
3:25 pm - 8:45 am
STL
-
EZE
15h 20m
2 stops
$1,005American Airlines
Booking Insights

KAYAK's insights & trends for Buenos Aires to Illinois flights

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

How much is a round-trip flight from Buenos Aires to Illinois?

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

What is the cheapest month to fly from Buenos Aires to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Buenos Aires 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 Buenos Aires to Illinois is November, when tickets cost $217 (return) on average. On the other hand, the most expensive months are March and February, when the average cost of round-trip tickets is $837 and $766 respectively.

Good to know

Low seasonMarch
Cheapest flight$400
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Buenos Aires to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Buenos Aires 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 Buenos Aires to Illinois.

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

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

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

    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 from Buenos Aires 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 Buenos Aires 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 Buenos Aires 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 4 airlines serving from Buenos Aires to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Buenos Aires 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 Buenos Aires 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.
7.8
DeltaOverall score based on 8453 reviews
7.8Comfort
8.1Boarding
7.8Entertainment
7.2Food
8.5Crew
Airline reviews

It was as good as it could be. Flying is not a pleasant experience these days.

8.0 ExcellentMark, Jun 2026
LAX - ORD
Read more Delta reviews

It was as good as it could be. Flying is not a pleasant experience these days.

There was an unruly family behind us that made the short flight miserable!!! The cabin crew did nothing to contain it.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

Got on the plane and sat there for an hour before departure.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

Cramped seating for me. Luckily it wasn’t a long flight

5 hour delay. They blamed the weather but it was the computer issues they had been dealing with for days.

I usually have a positive experience with Delta. Complimentary upgrades are always nice!

long flights are never truly comfortable but the airline did their best. crew was great and the flight was safe.

The captain was amazing and kept us informed throughout that there would be some rough air. The flight also got delayed but we were able to actually leave on time, which was great.

stood in line to check in luggage for nearly an hour. very poor service and not excusable

Same as the previous flight as far as comfort and food. Entertainment didn’t have a watchable screen so everything would need to be watched on your own device in which they didn’t have a charging port that accommodated my iPhone. Seats were very uncomfortable. Staff was very friendly.

Do not book it’s a scam! They stole $1200 from me

Flight got delayed; had to go through security three times.

We had a great flight just wished they had a tv so we can see a movie that would of made my trip excellent.

I selected first class expecting excetional service. It was mediocre at best. The food service was cold, meal choices was poor and on one leg they did provide dessert. I did enjoy the lay day seat but the movies were old and nothing current. Boarding the plane is always hot. So boarding is quite warm until your in the air. I took a small personal air fan. Update the meals and movies.

It was reasonably comfortable trip considering its duration (7 hours). Crew was very good and friendly, seats very more comfortable than other planes. Only negative comment would be that the bathroom light did not get its full brightness 🙃

Great from check in all the way to the end. Very happy with Copa

I would like a glass of wine or some kind of alcoholic drink.

Very long delay but we just made the connection. The requested wheel chairs were not there so I had to assist/carry BOTH of my parents to the gate while carrying their bags so we could make the connection. The plane had no entertainment system and NO WIFI, legroom zero. Restrooms on ALL of flights were dirty and one restroom did not even work properly. I was surprised to see COPA like this since my flight with them in 2013 was incredible, the seats were amazing and the food options were spectacular. Of course, I see this kind of service on many airlines now, with services and hospitality at an all time low. The worse part of the trip was seeing my 90 year old parents go through hell on these flights and having to try and rush to a gate to make the next flight. Never again

The planes can use an actual cleaning. The armrest and seats do not appear to be cleaned on this one and most other planes.

Flight was delayed…once landed at ORD, no gates were available so made us wait for 56 minutes after we landed to let us out of the aircraft!

Very efficient boarding and quick flight. Attendants don’t come by often so would often have a lot of trash at seat.

The flight de-boarded after being informed of a 3 hour delay. The gate agent said we could go to lounge. The flight ended up boarding 20 minutes later and I missed it.

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

Poor... food was horrible, boarding very slow, service on board mediocre

Crew was rude, almost 6 hour flight after horrific customs re entry line and near flight miss (unable to bug airport food) without food offerings.

The service could have been better and the food was bad

Muy puntual para la salida y la llegada, personal abordo correcto, la comida regular sobre todo el desayuno triste

This was a very good flight. The seats on the Dreamliner were comfortable and all the outlets were functional. The crew was friendly and helpful. Boarding was fairly efficient, although it was delayed by a baffling search of all the hand luggage for liquids. The timing of this flight, leaving at 10:30 PM, was excellent. It was a good time to arrive at DFW also, as there was almost no delay in going through customs and immigration. I'd fly this route, at this time, on this airline again without complaint.

Horrible experience with Avianca, they delayed their flight and when we arrived to NYC, AVIANCA took 1 hr y 30 mins to park the airplane and all passenger get off the plane, it made me lost all my trains to get back home and I came back to my place at 3 am instead of 12 am. On the top of that their plane seat are so uncomfortable and is not enough space and killed my legs and knees, Avianca used to be good when it was a Colombian company, now after Brasilian company bought them, their service quality is bad and their flights are delayed and oversold.

We found the chairs to be really uncomfortable. It’s also really unacceptable that no form of food or drink is included in a 6+ hour flight

We waited for one hour to deboard the plane after landing. That could be better

6 hour flight and have to pay for everything 100 dollars to add a carry-on bag is insane

Horrible experience. Flight cancelled. Arrived at destination 12 hs later. No one gave us an answer or any information. Very very poor service. We won’t ever travel again with Avianca

Very uncomfortable planes , poor service on the plane , take your own water so you don’t dehydrate , in a 6 hs flight they sold one time food and beverage . 1 plane was delayed 6 hs , I lost a connecting flight . Then in the way back they announce a delay of 2 hs so I had to take a different flight to arrive on time for my connecting flight . Avoid this airline .

Charging for WATER on a SIX hour flight in repugnant. Enough said!

Worst in 25 years. A 10 hours flight from Buenos Aires to Costa Rica and no free food! Then the food available for purchase was sold out in 5 minutes. I was travelling with two kids and wasn't ready to keep them happy with chips and cookies for such a long time. Avianca doesn't make sure that minors sit next to an adult so I was forced to pay 65 USD for each seat in a so called premium seat whic is exactly the same as the economy free seats. Never again with Avianca.

The flight was late olmost 3 hours , they send me to Cartagena … I suppose be in CR at 9 am , I fluid to Costa Rica at 5 pm …

GOL made the flight experience a true delight. Everything was smooth, from the check in process, to the disembarking moment.

Everything you need to know for your flight from Buenos Aires to Illinois

Cabin class types available on flights to Illinois

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