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$322+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BUE
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago to Buenos Aires are usually found in July or September, booked 53 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap 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 September 16, 2025.

Round-trip from

$718
(Priceline)

One-way from

$322
(Kiwi.com)

Popular in

December

Cheapest in

July

Average price

$1,032
From Chicago (CHI) to Buenos Aires (BUE)
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One-way flight from Chicago (CHI) to Buenos Aires (BUE)
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Highest demand for flights based on searches. 6% potential increase in price ($74 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 16, 2025.

This Priceline deal was found by Cheapflights users on 9/15. 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.
Sat 11/810:20 pmORD - EZE
1 stop23h 15mAvianca
Sun 11/167:35 amEZE - ORD
1 stop15h 45mAvianca
Deal found 9/15$718
This Avianca deal was found by Cheapflights users on 9/16. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:20 pmORD - EZE
1 stop14h 30mAvianca
Thu 11/277:35 amEZE - ORD
1 stop15h 45mAvianca
Deal found 9/16$747
This Copa Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 11/196:56 amORD - EZE
1 stop14h 57mCopa Airlines
Sun 11/232:32 pmEZE - ORD
1 stop25h 14mCopa Airlines
Deal found 9/15$748
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Thu 10/2310:27 amORD - EZE
2 stops36h 58mMultiple Airlines
Wed 11/57:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 9/16$762
This Copa Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 9/228:02 amORD - EZE
1 stop18h 11mCopa Airlines
Mon 9/2910:06 amEZE - ORD
1 stop16h 15mCopa Airlines
Deal found 9/15$768
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 11/126:56 amORD - EZE
1 stop15h 04mCopa Airlines
Sat 11/223:57 amEZE - ORD
1 stop35h 49mCopa Airlines
Deal found 9/15$782
This Copa Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 10/257:59 amORD - EZE
1 stop14h 35mCopa Airlines
Sun 11/912:08 amEZE - ORD
1 stop15h 38mCopa Airlines
Deal found 9/16$788
This Mytrip deal was found by Cheapflights users on 9/16. 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 10/245:05 amORD - EZE
3 stops23h 05mMultiple Airlines
Tue 10/281:40 amEZE - ORD
1 stop21h 40mMultiple Airlines
Deal found 9/16$793
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 11/184:35 amORD - EZE
1 stop16h 30mMultiple Airlines
Sun 11/237:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 9/15$795
This Mytrip deal was found by Cheapflights users on 9/15. 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 11/85:59 pmORD - EZE
2 stops30h 46mMultiple Airlines
Sun 11/167:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 9/15$796
This Mytrip deal was found by Cheapflights users on 9/16. 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 10/2410:27 amORD - AEP
2 stops19h 53mMultiple Airlines
Wed 10/292:30 pmAEP - ORD
3 stops24h 45mMultiple Airlines
Deal found 9/16$797
This Mytrip deal was found by Cheapflights users on 9/15. 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 11/88:50 pmORD - AEP
3 stops31h 40mMultiple Airlines
Sat 11/154:50 amAEP - ORD
2 stops34h 40mMultiple Airlines
Deal found 9/15$803

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 September 16, 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

Tue 11/18

6:56 am-1:00 am

1 stop15h 04m

Buenos Aires Ministro Pistarini

Mon 12/1

3:41 am-12:05 am

1 stop23h 24m

$748

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 11/19

6:56 am-12:53 am

1 stop14h 57m

Buenos Aires Ministro Pistarini

Sun 11/23

2:32 pm-12:46 pm

1 stop25h 14m

$748

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 11/19

6:56 am-12:53 am

1 stop14h 57m

Buenos Aires Ministro Pistarini

Thu 12/4

9:03 am-12:05 am

1 stop18h 02m

$748

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 9/23

8:02 am-12:44 am

1 stop14h 42m

Buenos Aires Ministro Pistarini

Fri 10/10

3:47 am-12:21 am

1 stop22h 34m

$748

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 11/5

6:56 am-1:00 am

1 stop15h 04m

Buenos Aires Ministro Pistarini

Tue 11/11

3:57 am-12:05 am

1 stop23h 08m

$748

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 11/28

6:56 am-4:22 am

1 stop18h 26m

Buenos Aires Ministro Pistarini

Sat 12/6

5:16 am-12:05 am

1 stop21h 49m

$768

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 11/26

2:07 pm-7:59 am

1 stop14h 52m

Buenos Aires Ministro Pistarini

Sun 12/7

3:41 am-12:05 am

1 stop23h 24m

$768

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 11/14

6:56 am-12:53 am

1 stop14h 57m

Buenos Aires Ministro Pistarini

Mon 12/1

5:16 am-12:05 am

1 stop21h 49m

$768

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 10/24

7:59 am-12:34 am

1 stop14h 35m

Buenos Aires Ministro Pistarini

Tue 10/28

3:57 am-12:56 am

1 stop22h 59m

$768

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Wed 11/12

10:20 pm-5:40 am

1 stop28h 20m

Buenos Aires Jorge Newbery

Sun 11/23

7:00 am-8:20 pm

1 stop16h 20m

$807

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results
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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 September 12, 2025.

The best time to book flights from Chicago to Buenos Aires is 53 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, April is the cheapest month in which you can book a flight from Chicago to Buenos Aires (average of $795). Flying from Chicago to Buenos Aires in December is currently the most expensive (average of $1,260). 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 September 16, 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 at noon tend to be the most expensive. A flight in the evening could potentially save you up to 14% 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 October 13, 2024.

Travelers seeking maximum savings on their Chicago to Buenos Aires flight should consider departing on Tuesday evenings when fares are most often at their lowest. Thursday evenings 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 September 16, 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
8.0
Very good
7,957 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Copa Airlines
7.6
Good
1,531 reviews
Delta
8.0
Very good
7,957 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,924 reviews
Delta
8.0
Very good
7,957 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,957 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Avianca
6.7
Okay
2,435 reviews
Delta
8.0
Very good
7,957 reviews

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $748, Copa Airlines can have you in Buenos Aires from Chicago in 15h 04m. 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 $699. Other airlines that can offer you cheap pricing are Arajet, from $736, and Avianca, from $753. Users have found that Copa Airlines is 39% cheaper than the other options available to this destination.

  • 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, April is the cheapest month in which you can book a flight from Chicago to Buenos Aires (average of $795). Flying from Chicago to Buenos Aires in December is currently the most expensive (average of $1,260). 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$699Average$1,022FlexibilityNo cancel feeOn-time70%
ArajetCheapest$736Average$884FlexibilityNo cancel feeOn-timeN/A
AviancaCheapest$753Average$1,160FlexibilityNo cancel feeOn-time71%
American AirlinesCheapest$1,015Average$1,245FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,023Average$1,222FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,094Average$1,217FlexibilityNo cancel feeOn-time69%

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