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$351+ 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BUE
jan 4 — jan 111
dom 1/4
dom 1/11
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Chicago to Buenos Aires are usually found in October or September, 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 dezembro 5, 2025.

This Mytrip deal was found by Cheapflights users on 12/3. 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.
qui 12/410:20 pmORD - EZE
1 stop23h 15mMultiple Airlines
qua 12/101:40 amEZE - ORD
2 stops25h 29mMultiple Airlines
Deal found 12/3$862
This FlightHub deal was found by Cheapflights users on 12/3. 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.
qui 12/411:15 amORD - EZE
2 stops23h 30mLATAM Airlines
qui 12/118:55 pmEZE - ORD
1 stop14h 44mLATAM Airlines
Deal found 12/3$893
This Arajet deal was found by Cheapflights users on 12/3. 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 Arajet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 12/85:45 amORD - EZE
1 stop15h 20mArajet
ter 12/2311:20 amEZE - ORD
1 stop14h 20mArajet
Deal found 12/3$923
This LATAM Airlines deal was found by Cheapflights users on 12/3. 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.
seg 12/86:45 amORD - EZE
2 stops20h 35mLATAM Airlines
ter 12/232:45 pmEZE - ORD
2 stops21h 51mLATAM Airlines
Deal found 12/3$926
This Kiwi.com deal was found by Cheapflights users on 12/4. 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.
dom 12/72:59 pmMDW - EZE
1 stop15h 36mMultiple Airlines
sáb 12/1311:00 amEZE - MDW
1 stop14h 30mMultiple Airlines
Deal found 12/4$935
This Kiwi.com deal was found by Cheapflights users on 12/3. 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.
seg 12/155:45 amORD - EZE
1 stop15h 20mMultiple Airlines
qui 1/1511:00 amEZE - ORD
1 stop24h 18mMultiple Airlines
Deal found 12/3$935
This Mytrip deal was found by Cheapflights users on 12/3. 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.
seg 12/85:45 amORD - EZE
2 stops18h 20mMultiple Airlines
ter 12/2311:20 amEZE - ORD
1 stop14h 20mMultiple Airlines
Deal found 12/3$943
This Kiwi.com deal was found by Cheapflights users on 12/4. 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.
sáb 12/1310:27 amORD - EZE
1 stop14h 18mArajet
sex 1/169:15 pmEZE - ORD
1 stop14h 42mArajet
Deal found 12/4$948
This Kiwi.com deal was found by Cheapflights users on 12/4. 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.
qui 12/115:40 amORD - EZE
2 stops21h 10mMultiple Airlines
sex 1/169:15 pmEZE - ORD
1 stop14h 42mMultiple Airlines
Deal found 12/4$972
This Kiwi.com deal was found by Cheapflights users on 12/3. 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.
qui 12/47:44 amMDW - EZE
2 stops19h 06mMultiple Airlines
qui 12/1111:00 amEZE - MDW
1 stop13h 53mMultiple Airlines
Deal found 12/3$1,029
This Mytrip deal was found by Cheapflights users on 12/3. 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.
seg 12/85:45 amORD - AEP
2 stops25h 15mMultiple Airlines
ter 12/2310:30 pmAEP - ORD
2 stops24h 40mMultiple Airlines
Deal found 12/3$1,054
This Mytrip deal was found by Cheapflights users on 12/4. 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.
dom 12/75:40 amORD - AEP
3 stops34h 00mMultiple Airlines
sáb 12/138:50 pmAEP - ORD
2 stops27h 20mMultiple Airlines
Deal found 12/4$1,088

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 dezembro 5, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$763
(Arajet)

One-way from

$351
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$1,221
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. 1% potential increase in price ($14 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 dezembro 5, 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

ORD - EZE

ORDEZE

Chicago O'Hare Intl

qua 3/25

6:45 am-12:05 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

ter 3/31

8:50 am-11:40 pm

1 stop16h 50m

$763

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

seg 2/9

6:57 pm-3:40 am

3 stops29h 43m

Buenos Aires Jorge Newbery

seg 2/23

5:45 am-9:16 am

3 stops30h 31m

$800

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

qua 5/20

5:35 am-12:05 am

1 stop16h 30m

Buenos Aires Ministro Pistarini

sex 7/3

9:15 pm-9:57 am

1 stop14h 42m

$818

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

seg 4/13

10:27 am-8:40 pm

3 stops32h 13m

Buenos Aires Jorge Newbery

ter 4/28

10:35 am-1:15 pm

3 stops28h 40m

$826

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

qua 1/28

5:45 am-12:05 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

sex 2/6

9:15 pm-8:57 am

1 stop14h 42m

$831

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

seg 1/19

6:57 pm-3:40 am

3 stops29h 43m

Buenos Aires Jorge Newbery

qua 1/28

11:30 am-11:22 am

3 stops26h 52m

$862

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

qua 4/8

3:45 pm-2:25 pm

2 stops20h 40m

Buenos Aires Ministro Pistarini

qua 4/15

4:35 pm-10:08 am

2 stops19h 33m

$863

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

qua 3/4

6:33 pm-3:40 am

3 stops30h 07m

Buenos Aires Jorge Newbery

sáb 3/14

3:40 pm-10:10 pm

3 stops32h 30m

$871

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

qua 3/25

6:45 am-3:05 am

2 stops18h 20m

Buenos Aires Ministro Pistarini

ter 3/31

8:50 am-11:40 pm

1 stop16h 50m

$875

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

sex 1/23

6:57 pm-3:40 am

3 stops29h 43m

Buenos Aires Jorge Newbery

seg 2/2

5:45 am-11:22 am

3 stops32h 37m

$876

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 60 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 November 28, 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 dezembro 5, 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.

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 dezembro 5, 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
8,010 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

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
8,010 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

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
7.6
Good
1,554 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

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
9,064 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

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
7.2
Good
11,047 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

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
6.6
Okay
2,479 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

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 $1,008, Arajet can have you in Buenos Aires from Chicago in 13h 22m. 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 dezembro 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
ArajetCheapest$360Average$894FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$699Average$976FlexibilityNo cancel feeOn-time70%
AviancaCheapest$750Average$1,131FlexibilityNo cancel feeOn-time71%
DeltaCheapest$951Average$1,194FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$951Average$1,166FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,015Average$1,252FlexibilityNo cancel feeOn-time71%

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