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$271+ Cheap flights from Chicago (CHI) to Buenos Aires (BUE)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BUE
Jan 24 — Jan 311
Sat 1/24
Sat 1/31
1 adult, Economy
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Find cheap flights from Chicago to Buenos Aires with Cheapflights

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Cheapflights Tip: The best prices from Chicago to Buenos Aires are usually found in October or November, booked 34 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from Chicago to Buenos Aires

Cheapest flights from Chicago to Buenos Aires
Explore the most affordable flight options available from Chicago to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 25, 2025.

This Booking.com deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:45 amORD - EZE
1 stop15h 20mMultiple Airlines
Sat 2/287:30 amEZE - ORD
1 stop15h 50mMultiple Airlines
Deal found 12/24$840
This FlightHub deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:22 pmORD - EZE
2 stops21h 23mLATAM Airlines
Sat 2/288:00 amEZE - ORD
2 stops18h 56mLATAM Airlines
Deal found 12/24$906
This LATAM Airlines deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/313:29 pmMDW - EZE
2 stops19h 16mLATAM Airlines
Sat 2/287:45 amEZE - MDW
2 stops17h 46mLATAM Airlines
Deal found 12/25$916
This Copa Airlines deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:33 amORD - EZE
1 stop14h 25mCopa Airlines
Mon 12/292:32 pmEZE - ORD
1 stop25h 20mCopa Airlines
Deal found 12/24$1,112
This Kiwi.com deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/313:32 pmMDW - EZE
1 stop24h 43mMultiple Airlines
Sat 2/2810:45 pmEZE - MDW
1 stop18h 11mMultiple Airlines
Deal found 12/25$1,147
This Kiwi.com deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:20 pmORD - EZE
1 stop14h 30mMultiple Airlines
Mon 12/292:40 amEZE - ORD
2 stops23h 45mMultiple Airlines
Deal found 12/24$1,148
This Copa Airlines deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:33 amORD - EZE
1 stop15h 25mCopa Airlines
Mon 12/2912:07 amEZE - ORD
1 stop15h 45mCopa Airlines
Deal found 12/24$1,167
This FlightHub deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:55 pmORD - AEP
2 stops18h 35mLATAM Airlines
Sat 2/288:25 pmAEP - ORD
2 stops20h 04mLATAM Airlines
Deal found 12/24$1,201
This Booking.com deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:45 amORD - EZE
1 stop15h 20mMultiple Airlines
Wed 1/71:40 amEZE - ORD
2 stops19h 57mMultiple Airlines
Deal found 12/24$1,229
This Priceline deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:35 pmORD - EZE
3 stops22h 15mAvianca
Fri 2/272:40 amEZE - ORD
2 stops20h 40mAvianca
Deal found 12/24$1,243
This Priceline deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/282:35 pmORD - EZE
2 stops31h 00mAvianca
Mon 12/292:40 amEZE - ORD
2 stops20h 40mAvianca
Deal found 12/24$1,260
This Expedia deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:16 pmORD - EZE
2 stops20h 04mMultiple Airlines
Mon 12/296:15 amEZE - ORD
2 stops35h 35mMultiple Airlines
Deal found 12/24$1,262

Find flight deals from Chicago to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Buenos Aires (BUE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 25, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$769
(Kiwi.com)

One-way from

$271
(Expedia)

Popular in

March

Cheapest in

October

Average price

$1,145
Provider with most accurate pricing for Chicago (CHI)-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Buenos Aires (BUE) flights.
Search Deals
From Chicago (CHI) to Buenos Aires (BUE)
Search Deals
One-way flight from Chicago (CHI) to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Buenos Aires that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 25, 2025.
Use the filters below to find and compare flights from Chicago to Buenos Aires that are best for you.

Fly from

Chicago

Fly to

Buenos Aires

Route

Depart

Return

Price

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Fri 3/20

12:47 pm-7:20 am

1 stop16h 33m

Buenos Aires Ministro Pistarini

Wed 3/25

2:45 pm-9:56 am

2 stops21h 11m

$791

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Thu 1/22

6:57 pm-8:30 am

2 stops34h 33m

Buenos Aires Jorge Newbery

Thu 1/29

2:30 pm-8:20 pm

3 stops32h 50m

$817

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 4/15

5:15 am-5:10 am

3 stops21h 55m

Buenos Aires Ministro Pistarini

Tue 4/21

11:00 am-11:40 pm

1 stop14h 40m

$842

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 3/5

7:15 am-3:10 pm

2 stops28h 55m

Buenos Aires Ministro Pistarini

Mon 3/16

4:45 pm-2:55 pm

2 stops24h 10m

$858

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Tue 3/24

9:46 am-11:00 pm

3 stops35h 14m

Buenos Aires Jorge Newbery

Sat 3/28

4:40 am-10:10 pm

3 stops43h 30m

$866

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 4/11

11:27 am-3:45 am

1 stop14h 18m

Buenos Aires Ministro Pistarini

Sat 4/25

4:45 pm-6:15 pm

2 stops27h 30m

$870

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 4/11

6:01 pm-2:30 pm

3 stops42h 29m

Buenos Aires Ministro Pistarini

Sat 4/25

4:30 pm-8:00 am

3 stops65h 30m

$871

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 3/5

10:20 pm-8:55 pm

2 stops19h 35m

Buenos Aires Ministro Pistarini

Wed 3/18

5:06 am-10:04 pm

1 stop18h 58m

$873

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 2/17

10:20 pm-3:50 pm

1 stop14h 30m

Buenos Aires Ministro Pistarini

Thu 2/26

4:55 pm-9:38 am

2 stops19h 43m

$881

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 4/9

8:06 am-2:30 am

1 stop16h 24m

Buenos Aires Ministro Pistarini

Sat 4/25

5:34 am-1:13 am

1 stop21h 39m

$910

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/23

Showing 1-10 of 58 results
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Compare providers for flights from Chicago to Buenos Aires

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Buenos Aires in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
SmartFaresPrice Accuracy1 starTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago-Buenos Aires flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Chicago-Buenos Aires flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Chicago-Buenos Aires flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-Buenos Aires flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-Buenos Aires flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Chicago to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Chicago with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Buenos Aires. Price data was last updated on December 19, 2025.

The best time to book flights from Chicago to Buenos Aires is 34 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Chicago to Buenos Aires?

Currently, October is the cheapest month in which you can book a flight from Chicago to Buenos Aires (average of $378). Flying from Chicago to Buenos Aires in June is currently the most expensive (average of $1,144). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CHI to BUE?

Find hourly flight availability from Chicago to Buenos Aires. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 25, 2025.

One of the essential ways to save on airfare from Chicago to Buenos Aires is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 11% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Chicago to Buenos Aires. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Chicago to Buenos Aires flight should consider departing on Sunday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Buenos Aires

Get insights into the airlines that provide service to Buenos Aires. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Buenos Aires. Reviews last updated December 25, 2025.
Peruse reviews from past customers who have flown with Delta, Copa Airlines, and United Airlines from Chicago to Buenos Aires to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,012 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,012 reviews
Delta
7.9
Good
8,012 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Copa Airlines
7.6
Good
1,559 reviews
Delta
7.9
Good
8,012 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,114 reviews
Delta
7.9
Good
8,012 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,057 reviews
Delta
7.9
Good
8,012 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Avianca
6.6
Okay
2,489 reviews
Delta
7.9
Good
8,012 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Buenos Aires. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago to Buenos Aires?

    For as low as $936, LATAM Airlines can have you in Buenos Aires from Chicago in 17h 15m. Airlines will cover a distance of 5603 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Chicago to Buenos Aires round-trip?

    Cheapflights users have booked flights from Chicago to Buenos Aires round-trip from $360. Other airlines that can offer you cheap pricing are Copa Airlines, from $569, and Avianca, from $726. Users have found that Arajet is 67% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Chicago to Buenos Aires one-way?

    $353 is the cheapest one-way deal found within the past few days, from Avianca. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $752 and $762, respectively.

  • What are the most popular routes from Chicago to Buenos Aires?

    The most popular route from Chicago to Buenos Aires is Chicago O'Hare Intl - Buenos Aires Ministro Pistarini. You may also consider Chicago O'Hare Intl - Buenos Aires Jorge Newbery or Chicago Midway - Buenos Aires Ministro Pistarini.

  • Can I find deals for flights from Chicago to Buenos Aires that include hotel bookings?

    Yes. In addition to deals on Chicago to Buenos Aires flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Buenos Aires?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Buenos Aires.

  • Can I find deals for business class flights from Chicago to Buenos Aires?

    Yes. Cheapflights offers flight deals from Chicago to Buenos Aires by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, October is the cheapest month in which you can book a flight from Chicago to Buenos Aires (average of $378). Flying from Chicago to Buenos Aires in June is currently the most expensive (average of $1,144). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Chicago to Buenos Aires

Discover the top 6 airlines that operate flights from Chicago to Buenos Aires. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
ArajetCheapest$360Average$894FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$699Average$963FlexibilityNo cancel feeOn-time70%
AviancaCheapest$750Average$1,062FlexibilityNo cancel feeOn-time71%
DeltaCheapest$951Average$1,195FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$951Average$1,161FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,015Average$1,256FlexibilityNo cancel feeOn-time71%

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