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$264+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BUE
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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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 March 10, 2026.

This Booking.com deal was found by Cheapflights users on 3/9. 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.
Sat 5/211:20 pm
ORD
-
AEP
2 stops20h 00m
Multiple Airlines
Sun 5/174:30 pm
AEP
-
ORD
3 stops22h 35m
Multiple Airlines
Deal found 3/9$898
This Mytrip deal was found by Cheapflights users on 3/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1711:20 pm
ORD
-
AEP
3 stops23h 47m
Multiple Airlines
Sat 4/2510:10 pm
AEP
-
ORD
2 stops25h 10m
Multiple Airlines
Deal found 3/9$899
This Booking.com deal was found by Cheapflights users on 3/9. 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.
Tue 4/147:17 am
ORD
-
EZE
2 stops20h 23m
Multiple Airlines
Sun 4/267:30 pm
EZE
-
ORD
2 stops27h 50m
Multiple Airlines
Deal found 3/9$901
This Justfly.com deal was found by Cheapflights users on 3/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1411:20 pm
ORD
-
EZE
1 stop28h 20m
Avianca
Tue 4/287:10 am
EZE
-
ORD
1 stop16h 10m
Avianca
Deal found 3/9$902
This Mytrip deal was found by Cheapflights users on 3/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1711:20 pm
ORD
-
AEP
3 stops23h 47m
Multiple Airlines
Tue 4/213:45 pm
AEP
-
ORD
3 stops34h 02m
Multiple Airlines
Deal found 3/9$902
This Gotogate deal was found by Cheapflights users on 3/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:21 pm
ORD
-
EZE
1 stop29h 04m
Copa Airlines
Sun 5/175:25 am
EZE
-
ORD
1 stop21h 50m
Copa Airlines
Deal found 3/9$904
This Mytrip deal was found by Cheapflights users on 3/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1612:12 pm
ORD
-
AEP
2 stops27h 08m
Multiple Airlines
Sat 5/232:55 pm
AEP
-
ORD
3 stops33h 15m
Multiple Airlines
Deal found 3/9$904
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Sat 4/2512:12 pm
ORD
-
EZE
1 stop13h 58m
Multiple Airlines
Sun 5/37:30 pm
EZE
-
ORD
2 stops27h 50m
Multiple Airlines
Deal found 3/10$905
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Fri 12/45:45 am
ORD
-
EZE
1 stop22h 00m
Multiple Airlines
Sun 12/208:40 am
EZE
-
ORD
1 stop15h 40m
Multiple Airlines
Deal found 3/9$906
This FlightHub deal was found by Cheapflights users on 3/9. 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 5/131:04 pm
ORD
-
EZE
2 stops20h 26m
LATAM Airlines
Wed 5/277:35 am
EZE
-
ORD
2 stops18h 24m
LATAM Airlines
Deal found 3/9$907
This KAYAK deal was found by Cheapflights users on 3/9. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/138:10 am
ORD
-
AEP
2 stops21h 30m
LATAM Airlines
Wed 5/273:45 pm
AEP
-
ORD
2 stops20h 31m
LATAM Airlines
Deal found 3/9$907
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Tue 4/144:51 pm
ORD
-
EZE
1 stop14h 29m
Multiple Airlines
Sat 4/256:35 am
EZE
-
ORD
2 stops19h 24m
Multiple Airlines
Deal found 3/9$909

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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$898
(Booking.com)

One-way from

$264
(eDestinos)

Popular in

May

Cheapest in

October

Average price

$1,125
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. 6% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 10, 2026.
Use the filters below to find and compare flights from Chicago to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Fri 4/17

11:20 pm-1:07 am

3 stops23h 47m

Buenos Aires Jorge Newbery

Sat 4/25

10:10 pm-9:20 pm

2 stops25h 10m

$899

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 5/2

6:40 am-4:10 am

2 stops19h 30m

Buenos Aires Ministro Pistarini

Sun 5/17

7:30 pm-9:20 pm

2 stops27h 50m

$904

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Sun 4/19

11:20 pm-5:40 am

1 stop28h 20m

Buenos Aires Jorge Newbery

Mon 4/27

7:00 am-9:20 pm

1 stop16h 20m

$917

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 6/8

8:02 am-2:30 am

1 stop16h 28m

Buenos Aires Ministro Pistarini

Mon 6/22

9:02 am-4:00 am

1 stop20h 58m

$945

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Thu 4/16

11:28 am-8:30 am

3 stops43h 02m

Buenos Aires Jorge Newbery

Sat 4/25

3:45 pm-11:47 pm

3 stops34h 02m

$964

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 9/4

6:45 am-6:45 am

1 stop22h 00m

Buenos Aires Ministro Pistarini

Wed 9/9

9:15 pm-11:40 pm

1 stop28h 25m

$990

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 6/2

8:02 am-12:52 am

1 stop14h 50m

Buenos Aires Ministro Pistarini

Thu 6/11

9:02 am-4:00 am

1 stop20h 58m

$995

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 6/6

8:02 am-12:52 am

1 stop14h 50m

Buenos Aires Ministro Pistarini

Sat 6/20

5:25 am-4:00 am

1 stop24h 35m

$995

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sun 6/7

8:02 am-12:52 am

1 stop14h 50m

Buenos Aires Ministro Pistarini

Sun 6/14

5:25 am-4:00 am

1 stop24h 35m

$995

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 4/7

8:06 am-12:50 am

1 stop14h 44m

Buenos Aires Ministro Pistarini

Sat 5/9

9:02 am-1:15 am

1 stop18h 13m

$995

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago-Buenos Aires flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 March 6, 2026.

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 $380). Flying from Chicago to Buenos Aires in June is currently the most expensive (average of $1,143). 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.

How much does it cost to fly round-trip from Chicago to Buenos Aires?

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 March 10, 2026.
Peruse reviews from past customers who have flown with Delta,Copa Airlines, andUnited 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
8,276 reviews

Comfort

7.9

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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
8,276 reviews
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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
7.5
Good
1,569 reviews
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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
9,409 reviews
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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
7.1
Good
11,414 reviews
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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
6.5
Okay
2,498 reviews
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.9

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 $945, Avianca can have you in Buenos Aires from Chicago in 16h 28m. Airlines will cover a distance of 5619 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 LATAM Airlines, from $727. 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 $380). Flying from Chicago to Buenos Aires in June is currently the most expensive (average of $1,143). 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.

Alternative routes for Chicago to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Ministro Pistarini flights
O'Hare Intl to Ushuaia flights

Top 7 airlines flying from Chicago to Buenos Aires

Discover the top 7 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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
ArajetCheapest$360Average$878FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$569Average$935FlexibilityNo cancel feeOn-time70%
LATAM AirlinesCheapest$727Average$792FlexibilityNo cancel feeOn-time81%
AviancaCheapest$750Average$990FlexibilityNo cancel feeOn-time71%
DeltaCheapest$951Average$1,325FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$951Average$1,140FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,015Average$1,254FlexibilityNo cancel feeOn-time71%

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