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CHI - BUE

Find cheap flights from Chicago to Buenos Aires from $298

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 6/15. 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
0 bags
Thu 5/23
Thu 5/30

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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.
In the last 7 days travelers have searched 44,632,927 times on KAYAK, and here is why:

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Cheap flight deals from Chicago to Buenos Aires (CHI-BUE)

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 and deals for you by selecting your travel dates.
Choose your dates
9:57 am - 12:55 amORD-EZE
36h 58m3 stops
8:00 am - 8:45 amEZE-ORD
26h 45m3 stops
Tue, May 21 - Tue, May 28
9:57 am - 12:55 amORD-EZE
36h 58m3 stops
1:40 am - 5:40 pmEZE-ORD
18h 00m2 stops
Tue, May 21 - Mon, May 27
6:48 pm - 9:40 amMDW-EZE
12h 52m1 stop
8:00 pm - 7:55 amEZE-MDW
13h 55m1 stop
$759Delta
Find Deal
Mon, May 20 - Mon, May 27
7:00 am - 6:15 amORD-EZE
21h 15m2 stops
9:30 pm - 5:01 pmEZE-ORD
21h 31m1 stop
$759Delta
Find Deal
Wed, May 8 - Mon, May 27
9:55 am - 6:55 amORD-EZE
19h 00m2 stops
8:50 pm - 2:20 pmEZE-ORD
19h 30m2 stops
$760American Airlines
Find Deal
Wed, May 8 - Sun, May 26
9:55 am - 6:55 amORD-EZE
19h 00m2 stops
9:54 pm - 5:25 pmEZE-ORD
21h 31m1 stop
$762American Airlines
Find Deal
Tue, May 7 - Mon, May 27
2:01 am - 9:10 pmORD-EZE
17h 09m1 stop
11:10 pm - 2:12 pmEZE-ORD
17h 02m1 stop
$906Aeromexico
Find Deal
Wed, May 22 - Thu, May 30
7:24 am - 9:10 pmORD-EZE
35h 46m1 stop
11:10 pm - 12:28 amEZE-ORD
27h 18m1 stop
$938Aeromexico
Find Deal
Wed, Jun 12 - Thu, Jun 20
3:10 pm - 7:40 amORD-EZE
14h 30m1 stop
12:49 am - 1:18 pmEZE-ORD
14h 29m1 stop
$984Copa Airlines
Find Deal
Fri, May 3 - Sat, May 11
7:56 am - 12:52 amORD-EZE
14h 56m1 stop
10:36 am - 12:15 amEZE-ORD
15h 39m1 stop
$1,002Copa Airlines
Find Deal
Tue, Aug 13 - Tue, Aug 20

Flights from Chicago to Buenos Aires - Travel Insights & Trends

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’s the cheapest day of the week to fly from Chicago to Buenos Aires?

The average price of all flights from Chicago to Buenos Aires clicked on KAYAK for each day over the last 12 months.
When flying from Chicago to Buenos Aires, you should consider leaving on a Wednesday and avoid Thursdays if you are looking for the best rates. For your return to Chicago, you’ll find the best rates on Mondays and the most expensive ones on Fridays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Chicago to Buenos Aires, 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 to Buenos Aires is October, where tickets cost $1,020 on average. On the other hand, the most expensive months are December and February, where the average cost of tickets is $1,580 and $1,262 respectively.

How far in advance should I book a flight from Chicago to Buenos Aires?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Chicago to Buenos Aires, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Chicago to Buenos Aires, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 72 days before departure.

Which airlines provide the cheapest flights from Chicago to Buenos Aires?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the best return deals on flights connecting Chicago to Buenos Aires were found on LATAM Airlines ($759) and Delta ($759). American Airlines proposed the cheapest one-way flight at $612.

Good to know

Low season

August

High season

March

Cheapest flight

$298
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Chicago O'Hare Airport 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 flights from Chicago to Buenos Aires

  • What are the seat upgrade options available on United Airlines flights from Chicago to Buenos Aires?

    United Airlines offers several seat upgrade options on flights from Chicago to Buenos Aires. Passengers can choose to upgrade to Economy Plus, which provides extra legroom and additional seat reclining. Another option is to upgrade to United Polaris Business Class, offering lie-flat seats, enhanced dining, and exclusive amenities. United also provides United Premium Plus, a premium economy cabin with extra legroom, dedicated service, and enhanced dining options.

  • What in-flight entertainment options does United Airlines have on flights from Chicago to Buenos Aires?

    United Airlines offers a range of in-flight entertainment options on flights from Chicago to Buenos Aires. Passengers can enjoy a wide selection of movies, TV shows, and music through personal seatback screens. United's entertainment system also provides games, podcasts, and a variety of language-learning programs.

  • What special meals does United Airlines offer on flights from Chicago to Buenos Aires?

    United Airlines offers a range of special meals on flights from Chicago to Buenos Aires. Passengers can choose from options such as vegetarian, vegan, gluten-free, lactose-free, kosher, and Hindu vegetarian meals. These special meals cater to various dietary restrictions and preferences, ensuring that passengers have a comfortable and enjoyable dining experience during their flight.

  • How does Aerolíneas Argentinas aid sustainability travel?

    Aerolíneas Argentinas promotes sustainability in its flights from Chicago to Buenos Aires through various measures. It utilizes modern fuel-efficient aircraft to reduce carbon emissions and invests in sustainable aviation biofuels. The airline also implements waste reduction and recycling programs on board, as well as encourages passengers to offset their carbon footprint. These efforts contribute to a more environmentally conscious and sustainable travel experience for passengers on this route.

  • What is the cheapest flight from Chicago to Buenos Aires?

    In the last 3 days, the lowest price for a flight from Chicago to Buenos Aires was $298 for a one-way ticket and $605 for a round-trip.

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

    Yes

  • 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?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Chicago and Buenos Aires, with Star Alliance 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 $1,167 and an overall rating of 8.0, Delta is the most popular choice. Copa Airlines is also a great choice for the route, with an average price of $1,155 and an overall rating of 7.8.

  • 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.

  • 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.

See more FAQs

Top tips for finding a cheap flight from Chicago to Buenos Aires

  • Upon arrival at Buenos Aires (BUE) after your flight from Chicago (CHI), you can easily reach the city center using various transportation options. The most convenient choice is taking a taxi or ride-sharing service available at the airport. Additionally, you can opt for public transportation by using the airport shuttle bus or the local subway system. These options will ensure a hassle-free journey to the vibrant city center of Buenos Aires.
  • Aerolíneas Argentinas permits passengers to bring pets on flights from Chicago to Buenos Aires. The airline has specific guidelines regarding pet travel. Dogs and cats are allowed as checked baggage, provided they weigh no more than 70 lbs.
  • You can pre-select your seat with Aerolíneas Argentinas on your flight from Chicago to Buenos Aires. Please note that specific seat selection policies may vary depending on the ticket type and fare class. It's advisable to check the airline's official website or contact their customer service for detailed information on seat selection options.
  • Aerolíneas Argentinas provides various kid-friendly amenities on flights from Chicago to Buenos Aires. They offer a dedicated children's menu with tasty options suitable for young travelers. Additionally, the airline provides entertainment options such as movies, TV shows, and games to keep kids engaged during the journey. For comfort, they offer children's seats and blankets.
  • Common layovers for United Airlines flights from Chicago to Buenos Aires include stops in Houston, Newark, and Washington D.C. These layovers provide passengers with convenient connections between the two cities. Passengers can enjoy a brief break before continuing their journey to Buenos Aires. United Airlines offers various flight options to accommodate different travel preferences and schedules on this popular route.
See more tips

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.
8.0
DeltaOverall score based on 11028 reviews
7.5food
8.6crew
8.0entertainment
8.2boarding
7.9comfort
Airline reviews

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive. I also upgraded to comfort + , I didn’t feel it was worth it. There was no benefit

2.0 MediocreMarisol, Apr 2024DFW - ATL
Read more about Delta reviews

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive. I also upgraded to comfort + , I didn’t feel it was worth it. There was no benefit

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive.

They did a fine job. Can't wait to use Delta in the future.

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

Seat back monitors and outlets were dead and not working.

Everything was great except for the seat. The backrest would not stay in the upright position.

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

Flight delayed about 2 hrs so it made it a VERY late night

The crew, food, and entertainment were all good. But my screen had some sort of bug where if I turned it off, it would turn back on after 2-5 minutes. At full brightness. It made it very hard to get any shut-eye on the overnight flight. Also, the older Boeing plane, while nicely cared for (and no doors fell off 😅👏) doesn't have the nice air quality of newer planes. So I felt a bit greasy by the time we landed in Sweden.

Copa performed as expected for the amount of money I was willing to spend for the flight; it wasn’t exceptional but it was not bad in any way either. The crew was good; friendly and straightforward. The food was airplane food, so no expectations there and the entertainment was lacking but that was my fault for owning an IPhone with a charging port that’s not compatible with the rest of the world. I’d fly Copa again.

Left my bags in origin city on a business class ticket , spent about 2-3 days in the same clothes plus the flight .

the planes are not modern there are no phone chargers

As usual, the flight with normal legroom was not very comfortable, but the second flight was much better because we had paid for extra legroom. It was very nice to check our bags without an extra fee.

LOCKED MY BAG WITHOUT CONSENT. Had to have my zippers cut upon arrival in Costa Rica.

Pros: "The seats in economy were confortable. The best thing was Copa gave us seats in the second line and my family traveled together."
Cons: "Coffe service could better the experience"
Pros: "The crew was very interested on help and attentive with the passengers. But the seat wasn't comfortable. The design of the cushion is not the best to be seating"
Pros: "You were on time, that is the most important thing in a fly"
Cons: "You could improve your entertainment, you are not a cheap company"
Pros: "That there was seltzer"
Cons: "The management of preparing the flight and plane so that it was ready for the trip!!"
Pros: "Copa was convenient and easy. Very easy boarding process and I appreciated the day flight."
Cons: "This is a business class that is equivalent to a US carrier domestic first class. Good seats, not lay flat but wide on my 737-800. The food and service emulated say American Airlines Domestic 1C as well. Everything was just good enough, and much cheaper that international business on the majors."

Some entertainment and food/snack service would have been nice

All the pessengers should be wait in a line útil the creo and piloto are arrived.

Planes seat could be bigger very uncomfortable for tall humans.

Atraso de dos horas y media con vuelos sobre vendidos

1 hour waiting for suitcases to come out traveling in business class and food in business class is a sandwich? Avoid Aeromexico .

No space reserved for anyone who didn’t have underseat in front of them. Made it inconvenient to get the backs secured. No inflight entertainment in the 190. Bring your own! Food was excellent and we were surprised to get a full breakfast.

Cons: "left Houston more than 2 hours later, arrive in Mexico over 2 am"
Cons: "El problema es que nunca pude cambiar mi vuelo y con ustedes fue imposible comunicarse para que me auxiliaran. Muy mal por ustedes no por la línea."
Pros: "The crew was amazing , the site is ok"
Cons: "I love Aeroméxico , thanks for de service and the food."
Pros: "Plenty a space between seats. Ver confortable seats and small entertainment screens!"
Cons: "Better selection of movie?"

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

Flight delayed for 2 hours due to a part. The plane sat waiting for boarding for a long time and during final preflight inspection the issue was found. Why not do the preflight inspection sooner if you know the plane is being used?

The flight experience was very good! Especially the United Club!

I was not able to buy food in the flight. They refer to include your Credit card in the APP, and if you are not from USA (i have a credit card form Canada) it is not possible

Aircraft has better leg room than any of United's larger planes. We had requested mobility assistance for this and related flights. United's response to all was superb.

The flight from Ottawa to Chicago took a lot longer due to DC in Ottawa. We got to Chicago and went to our gate to catch our flight. We only had nine minutes I found that very stressful.

Good boarding. Crew started quick with drinks and food. They came around several times for trash which I really liked. Other than turbulence due to storms in the area, flight was great.

my seat got changed twice after checking on then boarding it had been given to a family so by the time they found a seat for me no overhead storage left. i ended up losing my Sony Headphones case because i could even access underthe seat in front of my when deplaning.

All good, useful to have the united app from check in to boarding

All planes flying to Mexico City are very old. Seats don’t even have power outlets.

It was spectacular. I had basic Economy and was given so much space and their seats lean back so far. Staff was superb, food was superb, everything was superb, Finnair is Fantastic.

Good flights. Departure and arrivals were on time. DFW was a little problematic in that the Skytrain without prior notice bypassed the Echo terminal so that delayed my arrival at my connecting flight.

Because I can’t stand very long in one place, I was allowed to reword.

We were delayed bc ground crew gave the flight crew the wrong paperwork. We taxiied to the runway then back to the gate to get the correct paperwork that no one bothered reviewing the first time we pushed back. Boarding was rude and stressful like it always is. Gate agents and flight attendants are all over 55 years of age, embittered by years of underpayment From AA leading to their passive agressive bitchiness for no reason.

Boarding time was easy & quick. Crew was excellent. In-flight entertainment was great/easy. Seats are too small and not enough room between rows: felt like a sardine/very cramped.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

Excellent- plan was barely populated. I cannot remember a flight where I was able/encouraged to stretch out!

Great flight. Boarding was efficient and quick. On time departure and smooth flight. Flight arrived early at destination. Good experience.

Had technical issue which delayed the flight period. Flight crew knew there was 5 passengers that the connecting flight was within 15 minutes once at the gate. Rather than identify the 5 passengers to assure they got first. The flight attended mentioned it but didn't assist to assure passengers with connecting flights off first. This caused a hardship and our party of 3 missed the connecting flight.

I don't like that I have to pay if I want extra leg room. The seats are so expensive; I sit in normal seats and my legs and knees cramp the entire flight. I never feel comfortable on AA flights.

Book cheap flights from Chicago to Buenos Aires

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Chicago to Buenos Aires found on KAYAK in the last 72 hours.
6/15Sat
2 stops
40h 09mORD-EZE
$298
6/10Mon
3 stops
32h 12mORD-EZE
$336
5/2Thu
1 stopAmerican Airlines
21h 19mORD-EZE
$612
5/21Tue
1 stopDelta
22h 55mMDW-EZE
$717
6/27Thu
2 stopsDelta
21h 10mORD-EZE
$717
8/1Thu
1 stopAmerican Airlines
14h 29mORD-EZE
$767
8/22Thu
1 stopCopa Airlines
36h 12mORD-EZE
$1,126
7/1Mon
1 stopCopa Airlines
21h 50mORD-EZE
$1,159
8/21Wed
1 stopAeromexico
17h 25mORD-EZE
$1,364
8/28Wed
1 stopAeromexico
17h 20mORD-EZE
$1,479

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Last minute flights from Chicago to Buenos Aires

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Chicago to Buenos Aires that are departing in the next 10 days.
4/24Wed
multi-stopUnited Airlines
19h 15mORD-EZE
5/2Thu
multi-stopUnited Airlines
15h 48mEZE-ORD
$887
4/28Sun
multi-stopUnited Airlines
32h 23mORD-EZE
5/8Wed
multi-stopUnited Airlines
14h 30mEZE-ORD
$897
4/27Sat
multi-stopUnited Airlines
14h 00mORD-EZE
5/7Tue
multi-stopUnited Airlines
14h 30mEZE-ORD
$912
4/27Sat
multi-stop
31h 40mORD-EZE
5/5Sun
multi-stop
30h 18mEZE-ORD
$1,000
4/24Wed
multi-stopDelta
18h 25mORD-EZE
5/2Thu
multi-stopDelta
18h 17mEZE-ORD
$1,014
4/28Sun
multi-stopDelta
34h 30mORD-EZE
5/7Tue
multi-stopDelta
18h 20mEZE-ORD
$1,022
4/24Wed
multi-stopAeromexico
17h 59mORD-EZE
5/2Thu
multi-stopAeromexico
26h 49mEZE-ORD
$1,108
4/24Wed
multi-stopAeromexico
29h 09mORD-EZE
5/3Fri
multi-stopAeromexico
19h 18mEZE-ORD
$1,133
4/25Thu
multi-stopAmerican Airlines
17h 10mORD-EZE
4/27Sat
multi-stopAmerican Airlines
22h 06mEZE-ORD
$1,237
4/27Sat
multi-stopCopa Airlines
15h 02mORD-EZE
5/4Sat
multi-stopCopa Airlines
14h 29mEZE-ORD
$1,277

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Flights to Buenos Aires

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