ORD - EZE

$233 Find Cheap Flights from Chicago to Buenos Aires

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Buenos Aires departing on 4/19. 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 Buenos Aires Ministro Pistarini Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Buenos Aires.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Buenos Aires.
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$908
Overall average: $1,126
United Airlines
Sun 3/29Tue 4/7
ORD - EZE • 1 stop
Cheapest one-way
$233
Typical prices: $284-$430
Multiple Airlines
Sun 4/19
ORD - EZE • 3 stops
Top airlines
United Airlines
Cheapest • from $908 (round-trip)
Copa Airlines
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 13% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 15% price drop
December
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 Buenos Aires!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Chicago to Buenos Aires (ORD-EZE)

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

Sun, Mar 29 - Tue, Apr 7
United Airlines Logo
9:28 pm - 8:00 am
ORD
-
EZE
32h 32m
1 stop
United Airlines Logo
9:00 pm - 10:05 am
EZE
-
ORD
15h 05m
1 stop
$908United Airlines
Tue, Apr 7 - Sat, May 9
Air Canada Logo
6:01 pm - 2:30 pm
ORD
-
EZE
42h 29m
3 stops
Air Canada Logo
4:35 pm - 8:00 am
EZE
-
ORD
41h 25m
3 stops
$909Air Canada
Thu, May 14 - Sat, May 23
Multiple Airlines Logo
1:40 am - 5:00 am
ORD
-
EZE
25h 20m
3 stops
Multiple Airlines Logo
2:45 am - 10:10 pm
EZE
-
ORD
21h 25m
1 stop
$911Multiple Airlines
Sun, Mar 8 - Sat, Mar 14
Multiple Airlines Logo
7:23 pm - 9:35 am
ORD
-
EZE
36h 12m
1 stop
Multiple Airlines Logo
10:45 pm - 8:25 am
EZE
-
ORD
35h 40m
1 stop
$912Multiple Airlines
Mon, Mar 30 - Mon, Apr 6
Delta Logo
9:40 am - 9:45 am
ORD
-
EZE
22h 05m
1 stop
Delta Logo
3:55 am - 11:54 pm
EZE
-
ORD
21h 59m
2 stops
$913Delta
Sun, May 17 - Sat, May 23
Multiple Airlines Logo
11:20 pm - 4:00 am
ORD
-
EZE
26h 40m
3 stops
Multiple Airlines Logo
2:30 am - 10:10 pm
EZE
-
ORD
21h 40m
2 stops
$914Multiple Airlines
Tue, Mar 3 - Wed, Mar 25
LATAM Airlines Logo
11:18 am - 9:00 am
ORD
-
EZE
18h 42m
1 stop
LATAM Airlines Logo
8:55 pm - 4:49 pm
EZE
-
ORD
21h 54m
1 stop
$916LATAM Airlines
Wed, May 20 - Thu, Jun 4
Delta Logo
8:10 am - 9:45 am
ORD
-
EZE
23h 35m
1 stop
Delta Logo
8:10 pm - 4:49 pm
EZE
-
ORD
22h 39m
1 stop
$917Delta
Fri, Apr 17 - Sat, Apr 25
Multiple Airlines Logo
3:45 pm - 2:30 pm
ORD
-
EZE
20h 45m
2 stops
Multiple Airlines Logo
4:30 pm - 8:00 am
EZE
-
ORD
41h 30m
2 stops
$918Multiple Airlines
Wed, May 20 - Wed, Jun 3
LATAM Airlines Logo
9:44 am - 11:30 am
ORD
-
EZE
23h 46m
2 stops
LATAM Airlines Logo
7:35 am - 10:06 am
EZE
-
ORD
28h 31m
3 stops
$920LATAM Airlines
Booking Insights

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

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

What is the cheapest month to fly from Chicago O'Hare Intl Airport to Buenos Aires Ministro Pistarini Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago O'Hare Intl Airport to Buenos Aires Ministro Pistarini Airport, 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 Chicago O'Hare Intl Airport to Buenos Aires Ministro Pistarini Airport is November, where tickets cost $943 (return) on average. On the other hand, the most expensive months are June and August, where the average cost of round-trip tickets is $1,243 and $1,207 respectively.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Buenos Aires Ministro Pistarini Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago O'Hare Intl Airport to Buenos Aires Ministro Pistarini Airport, 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 the flight from Chicago O'Hare Intl Airport to Buenos Aires Ministro Pistarini Airport, you should book around 3 weeks before departure, which saves you about 13% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonJuly
Cheapest flight$233
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 8% increase in price.
Flight from Chicago to Buenos Aires

When to book flights from Chicago to Buenos Aires

Are your dates flexible? Find out the best times to travel from Chicago to Buenos Aires based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Chicago to Buenos Aires flights

  • What is the cheapest flight from Chicago O'Hare Intl Airport to Buenos Aires Ministro Pistarini Airport?

    In the last 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to Buenos Aires Ministro Pistarini Airport was $233 for a one-way ticket and $908 for a round-trip.

  • Do I need a passport to fly between Chicago and Buenos Aires?

    Yes, you’ll need a passport to travel to Buenos Aires from Chicago.

  • Which aircraft models fly most regularly from Chicago to Buenos Aires?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Chicago to Buenos Aires?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Chicago and Buenos Aires, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Chicago to Buenos Aires, Delta or Copa Airlines?

    The two airlines most popular with KAYAK users for flights from Chicago to Buenos Aires are Delta and Copa Airlines. With an average price for the route of $1,315 and an overall rating of 7.9, Delta is the most popular choice. Copa Airlines is also a great choice for the route, with an average price of $966 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from Chicago to Buenos Aires?

    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 Chicago to Buenos Aires.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Buenos Aires from 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 from Chicago to Buenos Aires?

    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 Buenos Aires with an airline and back to Chicago with another airline. Booking your flights between Chicago and EZE can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to Buenos Aires?

    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 Buenos Aires from Chicago 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 serving from Chicago to Buenos Aires

 
See real verified KAYAK customer reviews for airlines flying from Chicago to Buenos Aires. 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 Chicago to Buenos Aires? 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.
7.5
Copa AirlinesOverall score based on 1559 reviews
7.4Comfort
6.8Food
7.8Boarding
6.8Entertainment
8.1Crew
Airline reviews

Seats were awful. Media should have been included for such a long flight.

4.0 OkayPaul, Jan 2026
LIM - PTY
Read more Copa Airlines reviews

Seats were awful. Media should have been included for such a long flight.

There should be a warning regarding the quality of the aircraft on the website as we reserve the tickets. There was no TV or any type of screen onboard. The wifi they offer is good for nothing. Traveling 9 hours straight with kids and no type of entetainment was horrible. I wish I had been informed prior so I could buy a ticket with another airline. The food was a joke too. A very tiny portion per passenger. They also charged $100 per checked bag. With United I used to pay $60. So, fair to say that I wont be flying Copa anymore. Their aircraft was super old, outdated, no entertainment, with nearly no onboard food.

The flight was good overall. Everything went smoothly, although the landing was a bit rough. Still, it was a pleasant experience

Very strict carry on rules meant most of the plane had to gate check their luggage. As is often the case had things that were broken because of this, but I appreciated not being charged to gate check. Otherwise good flight and great crew once on the plane

Simply as follows:- First, there was no vegetarian option for the meal Second, only 2 washrooms for the entire economy class.

I liked the meatloaf the chicken was awful but the plane was on time and got there and the staff was nice.

Boarding was quick & efficient; they gave boarding groups due priority; staff & air crew were very cordial and helpful, pleasant flight.

As always, Copa Airlines is great to fly on. The flights are always on time, the staff are pleasant and helpful and it's always a wonderful flying experience.

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.

Very happy with my flight. I would definitely recommend it.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Not being stranded in Chicago for her airport to 11:30 tomorrow morning the 3rd

I was fully checked in the prior night and i was unchecked and then didn’t have a seat when I boarded. Instead of an aisle seat, I was out in the middle seat of the very last row of the plane.

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

They lost my luggage, so, not happy. The crew was nice but my suitcases never made it, still trying to find out what happened!

I understand weather is an issue, but making us chase our plane down at five scheduled gates across three terminals in an airport the size of O'Hare was unfair. They'd have probably been better off to leave gates as TBD until the inbound plane is in final approach instead of running us all over the place. Also, props to the consistently-unprepared ground crew in Richmond for once again leaving my lane parked short of the gate because they couldn't have a crew in place on time with 2 hours notice...

cabin crew was OK, food was OK, the trip from the US to Munich was actually pretty bad comfort wise. Noisy aircraft, lights never dimmed even in Business class (night flight) barely sufficient amenities for the price. I have millions of miles with United but TBH American is gaining ground and Delta has always been marginally better then United although on paper United has more longes and cheaper upgrades.

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Not United Airlines' fault. It's ORL airport's fault.

Great flight. On time boarding. Smooth flight and on time arrival at EWR. The flight crew was marvelous and there was a great selection of movies on the entertainment system. Our bags were at the carousel before we got there. Another excellent flight from United.

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

Delayed an hour due to operational issues. Minimal apologies or care for the significant inconvenience caused. Landed at nearly 1am and they still couldn’t find ground staff to get us off the plane promptly.

The aircraft had several problems - from excess fuel to non operational ac. Two hours of delay in Chicago could have been avoided with proper planning and aircraft maintenance.

Crew in Columbia was not prepared for landing. It was a bit of a disaster and getting bags took forever.

We were upgraded to First Class and it was a great flight

We experienced gate changes and a long delay. My seat was dirty when I boarded and I had to use wipes to clean it myself. There was an unpleasant and overpowering cleaning product scent on the plane as well that lingered through the flight.

My carry on baggage was damaged. Entire trip, I had to carry the baggage. When complained to the boarding crew, they got mad at me and still asked me to valet check in the cabin baggage. Rude boarding crew!!!

Crew were all friendly and helpful. It was a short flight so just a beverage service with a cookie. After we were boarded the plane took about 45 minutes to leave the gate but it was New Year’s Eve so not shocking there was some delay. Overall good experience and very grateful.

The boarding process needs to be fixed. The zone don't work, especially when there is hardly anyone in zones 3, 4,and 5, leaving the majority of the passengers backed up in the aisle, especially because passengers seated near the front are blocking passengers who are seated in the rear of the plane. It would also help if the size of carry on bags was more strictly enforced.

The boarding by groups is pointless. The first two groups worked fine, but almost Noone boarded in goups three thru five leaving the vast majority boarding when group six was called. It defeated the purpose of spreading out the crowd.

It was delayed and I lost my connection flight to Cali and I missed my Mom's funeral

I actually upgraded to the medium level of seats from basic and even doing that it may have been physically the most uncomfortable flight I have ever had. They packed everyone like is a train to death camp. It was a red eye so I hoped to get some sleep but it was physically impossible to find a comfortable way to rest. I met other folks on the same flight and they said the same thing. It was an utterly miserable flight and if I have any other options I will never fly with them again

Provide free food and drinks on an international flight. Add updated head rests

Deplaning was a mess, I sat in business (seats are horrible) and the front door had a problem so we had to deplane from the rear exit. The stairs were not tall enough to reach so there was a large step down from the plane to the top of the stairs.

Staff are the rudest in the industry … awful customer service … will never fly Avianca again

Pros: we leave and arrive on time Cons: the most uncomfortable seats ever. You cant recline at all your seats. No entertainment No TVs flight attendants didn't provide even a glass of water. You have to go to back of the airplane and ask for one. I am Colombian and I remember seeing the flight attendants very neat, elegants which is or was a staple of Avianca.it was one with tennis shoes, no male up, the hair was messy... that was really odd.

Here we have another airline flying to Guatemala but doesn't have a plus or a less, just in the middle. Why? Well, first we don't have even free water Movie selection is poor Seats don't recline in some places Food selection is carb based Forgot to mention, customer service on the web is the worst. Good things; Very reliable on schedule Kind crew

Last seat of Bussines Class it does recline but passenger seating behind kept pushing since they did not have space once my seat was reclined

I handed in my suitcase in perfect condition at SAL Airport. And in MIA Airport I received it with one corner broken and the wheels bent.

I like the crew members they're very friendly. Clean plane. The flight was on time. I dont like the comfort my car seat its better that the plane seats. They charge for everything. This airline was very good. Now it's a low cost airline

Awful. Not water, or chargers or space under the seats, the plane was very old and poor maintenance, seats really dirty, sticky, seats pockets with wires pinching your knees. Connection with no announcements, plane departed 1.30 hour earlier for an extra stop to refueling in Trinidad & Tobago. Even that we had a 3 hrs delay, seated in the plane in the runway.

Really bad. Uncommunicated stop in Trinidad & Tobago for refueling. Extra stop added 3 hours of discomfort without allowing off the seat. Not even water, or chargers or boarding groups.

Staff were unfriendly and rude. Was stuck on runway for 2 hours after arrival in Boston.

Horrible service. No communication from the crew as to why a 6 hour delay then cancellation

We waited in an overcrowded bus for over a half hour. It was uncomfortable. It would have been better to have waited in the terminal in a line

The food for sale on board has opportunity for improvement.

I paid extra for a comfortable seat in the second flight, but the plane didn't have those seats, the first one did

The Arajet person who greeted us initially was unhelpful & rude about the mandatory migration form which has to be completed digitally but the systems don’t work properly. The boarding gate was changed twice and initial boarding was delayed. Once on board we we had to wait an hour and a half before take off. It was hot and there was very little room for tall-ish people to fit their knees in. The crew were pleasant but working in a poor situation. The plane was delayed because we were waiting for people from a delayed interconnecting flight. Arajet must have known that before we were asked to board. Better information, decisions & communication were needed.

My seat was broken and the crew had to find me somewhere else to sit. The crew was extremely courteous about this

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

Information on your arrival and departure airports