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$352+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BUE
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago to Buenos Aires are usually found in September or July, 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 July 3, 2025.

Round-trip from

$704
(Kiwi.com)

One-way from

$352
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$1,072
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. 8% potential increase in price ($114 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/1. 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 8/212:35 pmORD - EZE
1 stop13h 10mMultiple Airlines
Fri 8/294:45 amEZE - ORD
2 stops30h 37mMultiple Airlines
Deal found 7/1$704
This Expedia deal was found by Cheapflights users on 7/1. 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.
Fri 9/122:35 pmORD - EZE
1 stop22h 45mAvianca
Fri 9/191:40 amEZE - ORD
1 stop13h 35mAvianca
Deal found 7/1$743
This Trip.com deal was found by Cheapflights users on 7/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/141:07 amORD - EZE
1 stop21h 37mCopa Airlines
Fri 8/228:55 amEZE - ORD
1 stop17h 26mCopa Airlines
Deal found 7/1$769
This Mytrip deal was found by Cheapflights users on 7/1. 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.
Wed 8/135:05 amORD - AEP
3 stops34h 15mMultiple Airlines
Tue 8/1912:05 amAEP - ORD
3 stops25h 54mMultiple Airlines
Deal found 7/1$779
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 12/304:35 amORD - EZE
1 stop16h 30mArajet
Tue 1/2011:07 amEZE - ORD
1 stop14h 33mArajet
Deal found 6/30$783
This LATAM Airlines deal was found by Cheapflights users on 7/1. 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.
Sat 10/1810:35 amMDW - EZE
2 stops17h 35mLATAM Airlines
Thu 10/235:30 amEZE - MDW
2 stops32h 25mLATAM Airlines
Deal found 7/1$966
This Delta deal was found by Cheapflights users on 7/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/286:47 pmMDW - EZE
1 stop12h 58mDelta
Wed 8/278:10 pmEZE - MDW
2 stops18h 18mDelta
Deal found 7/2$1,007
This LATAM Airlines deal was found by Cheapflights users on 7/2. 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 11/125:25 pmMDW - AEP
2 stops19h 35mLATAM Airlines
Wed 11/193:40 pmAEP - MDW
2 stops21h 11mLATAM Airlines
Deal found 7/2$1,011

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 July 3, 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

Thu 8/21

2:35 pm-5:45 am

1 stop13h 10m

Buenos Aires Ministro Pistarini

Fri 8/29

4:45 am-9:22 am

2 stops30h 37m

$704

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 9/12

2:35 pm-3:20 pm

1 stop22h 45m

Buenos Aires Ministro Pistarini

Fri 9/19

1:40 am-1:15 pm

1 stop13h 35m

$743

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 8/14

1:07 am-12:44 am

1 stop21h 37m

Buenos Aires Ministro Pistarini

Fri 8/22

8:55 am-12:21 am

1 stop17h 26m

$769

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Wed 8/13

5:05 am-5:20 pm

3 stops34h 15m

Buenos Aires Jorge Newbery

Tue 8/19

12:05 am-11:59 pm

3 stops25h 54m

$779

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Mon 7/28

6:47 pm-9:45 am

1 stop12h 58m

Buenos Aires Ministro Pistarini

Thu 8/28

8:10 pm-12:28 pm

2 stops18h 18m

$1,007

ChicagoBuenos Aires

MDW - AEP

MDWAEP

Chicago Midway

Wed 11/12

5:25 pm-4:00 pm

2 stops19h 35m

Buenos Aires Jorge Newbery

Wed 11/19

3:40 pm-9:51 am

2 stops21h 11m

$1,011

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Sat 7/19

10:30 am-6:10 am

2 stops17h 40m

Buenos Aires Ministro Pistarini

Wed 7/30

5:55 am-9:42 pm

2 stops17h 47m

$1,083

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sun 8/31

7:46 pm-11:45 am

3 stops37h 59m

$352

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Sun 8/31

7:46 pm-9:40 am

3 stops35h 54m

$352

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 8/21

2:35 pm-5:45 am

1 stop13h 10m

$366

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 18 results
1
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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 June 27, 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 July 3, 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.

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 July 3, 2025.
Peruse reviews from past customers who have flown with Delta, LATAM Airlines, and Copa 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
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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!
LATAM Airlines
7.5
Good
1,805 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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
7.5
Good
1,467 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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!
GOL
7.3
Good
1,086 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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
2,363 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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.

  • 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 $743. Other airlines that can offer you cheap pricing are Copa Airlines, from $769, and Delta, from $1,007. Users have found that Avianca is 36% cheaper than the other options available to this destination.

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

    $366 is the cheapest one-way deal found within the past few days, from Avianca. You may also be able to find cheap deals on GOL and Delta, with prices starting from $425 and $708, 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, 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

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Top 5 airlines flying from Chicago to Buenos Aires

Discover the top 5 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$722Average$1,094FlexibilityNo cancel feeOn-time70%
AviancaCheapest$750Average$1,186FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,023Average$1,205FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$1,023Average$1,259FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,094Average$1,238FlexibilityNo cancel feeOn-time69%

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