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$304+ Cheap flights from O'Hare Intl (ORD) 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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUE
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to Buenos Aires are usually found in November or July, booked 43 days in advance, depart on a Tuesday or Friday and return on a Wednesday

Cheap flight deals from O'Hare Intl to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) 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 November 13, 2025.

Most accurate provider

OneTravel
3 stars

Most trusted provider

OneTravel
3 stars

Round-trip from

$767
(Mytrip)

One-way from

$304
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$1,015
Provider with most accurate pricing for Chicago O'Hare Intl-Buenos Aires (BUE) flight deals.
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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-Buenos Aires (BUE) flights.
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From Chicago O'Hare Intl to Buenos Aires (BUE)
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One-way flight from Chicago O'Hare Intl to Buenos Aires (BUE)
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from O'Hare Intl to Buenos Aires

Cheapest flights from O'Hare Intl to Buenos Aires
Explore the most affordable flight options available from O'Hare Intl to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/12. 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 12/47:41 pmORD - EZE
1 stop34h 54mMultiple Airlines
Wed 12/103:41 amEZE - ORD
2 stops17h 55mMultiple Airlines
Deal found 11/12$769
This Mytrip deal was found by Cheapflights users on 11/12. 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.
Mon 12/15:45 amORD - AEP
2 stops25h 00mMultiple Airlines
Thu 12/47:00 amAEP - ORD
3 stops26h 05mMultiple Airlines
Deal found 11/12$780
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/117:41 pmORD - EZE
1 stop20h 34mMultiple Airlines
Wed 1/285:00 pmEZE - ORD
2 stops30h 20mMultiple Airlines
Deal found 11/11$813
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/105:00 amORD - EZE
2 stops21h 50mMultiple Airlines
Wed 12/1711:00 amEZE - ORD
1 stop33h 00mMultiple Airlines
Deal found 11/11$818
This Trip.com deal was found by Cheapflights users on 11/12. 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.
Mon 12/15:45 amORD - EZE
1 stop15h 20mMultiple Airlines
Thu 12/411:00 amEZE - ORD
1 stop34h 36mMultiple Airlines
Deal found 11/12$822
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/117:41 pmORD - EZE
1 stop20h 34mMultiple Airlines
Fri 1/232:40 amEZE - ORD
2 stops21h 14mMultiple Airlines
Deal found 11/11$827
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 11/2910:27 amORD - EZE
1 stop14h 18mMultiple Airlines
Fri 12/52:40 amEZE - ORD
2 stops23h 13mMultiple Airlines
Deal found 11/12$829
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Wed 12/33:43 pmORD - EZE
2 stops35h 07mMultiple Airlines
Wed 12/1711:00 amEZE - ORD
1 stop33h 00mMultiple Airlines
Deal found 11/10$838
This Mytrip deal was found by Cheapflights users on 11/12. 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.
Thu 12/47:41 pmORD - AEP
2 stops32h 49mMultiple Airlines
Thu 12/119:50 amAEP - ORD
3 stops35h 46mMultiple Airlines
Deal found 11/12$851
This Mytrip deal was found by Cheapflights users on 11/12. 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.
Sun 12/149:14 pmORD - EZE
3 stops34h 06mMultiple Airlines
Tue 12/162:40 amEZE - ORD
2 stops24h 29mMultiple Airlines
Deal found 11/12$853
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/117:41 pmORD - EZE
1 stop20h 34mMultiple Airlines
Tue 1/275:00 pmEZE - ORD
2 stops23h 14mMultiple Airlines
Deal found 11/11$858
This Booking.com deal was found by Cheapflights users on 11/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:45 amORD - EZE
1 stop15h 20mArajet
Sun 12/148:40 amEZE - ORD
1 stop15h 30mArajet
Deal found 11/10$860

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl 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 November 13, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Buenos Aires that are best for you.

Fly from

O'Hare Intl

Fly to

Buenos Aires

Route

Depart

Return

Price

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Mon 12/1

5:45 am-9:45 am

2 stops25h 00m

Buenos Aires Jorge Newbery

Thu 12/4

7:00 am-6:05 am

3 stops26h 05m

$780

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Wed 2/4

5:45 am-9:40 am

2 stops24h 55m

Buenos Aires Jorge Newbery

Wed 2/18

9:50 am-6:15 pm

3 stops35h 25m

$843

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Thu 12/4

7:41 pm-7:30 am

2 stops32h 49m

Buenos Aires Jorge Newbery

Thu 12/11

2:30 pm-8:20 pm

2 stops32h 50m

$873

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Wed 12/10

5:00 am-7:30 am

2 stops23h 30m

Buenos Aires Jorge Newbery

Wed 12/17

9:50 am-2:53 pm

3 stops32h 03m

$876

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Sun 1/18

9:14 am-8:40 pm

3 stops32h 26m

Buenos Aires Jorge Newbery

Sun 2/1

5:15 pm-10:06 pm

2 stops31h 51m

$876

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Fri 12/12

7:10 am-7:30 am

2 stops21h 20m

Buenos Aires Jorge Newbery

Mon 12/15

1:00 pm-8:20 pm

2 stops34h 20m

$886

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 3/11

8:34 am-1:57 am

1 stop15h 23m

Buenos Aires Ministro Pistarini

Tue 3/17

2:43 pm-1:31 pm

1 stop24h 48m

$890

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 12/2

7:33 am-12:58 am

1 stop14h 25m

Buenos Aires Ministro Pistarini

Tue 12/16

9:03 am-12:05 am

1 stop18h 02m

$890

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 3/12

8:34 am-4:10 am

1 stop17h 36m

Buenos Aires Ministro Pistarini

Tue 3/24

2:43 pm-1:31 pm

1 stop24h 48m

$890

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 12/10

3:53 pm-9:20 am

1 stop14h 27m

Buenos Aires Ministro Pistarini

Wed 1/28

10:05 pm-10:07 am

1 stop15h 02m

$902

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 41 results
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Compare providers for flights from O'Hare Intl 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 O'Hare Intl to Buenos Aires in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OneTravelPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 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 O'Hare Intl Airport-Buenos Aires flights, users find the pricing of OneTravel to be most consistent on Cheapflights vs. OneTravel Users can find the same prices on Chicago O'Hare Intl Airport-Buenos Aires flight deals on Cheapflights vs. OneTravel >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Buenos Aires flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-Buenos Aires flights, Cheapflights users trust OneTravel the most. OneTravel 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 O'Hare Intl Airport-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 O'Hare Intl to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from O'Hare Intl 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 O'Hare Intl Airport to Buenos Aires

How far ahead should I book a flight from Chicago O'Hare Intl Airport to Buenos Aires?

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Buenos Aires. Price data was last updated on November 7, 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Buenos Aires is 43 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 O'Hare Intl Airport to Buenos Aires?

Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Buenos Aires (average of $378). Flying from Chicago O'Hare Intl Airport 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 ORD to BUE?

Find hourly flight availability from O'Hare Intl 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 November 13, 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to Buenos Aires in the evening. Doing so could potentially save you 10% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to Buenos Aires?

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

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport 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 O'Hare Intl Airport 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 November 13, 2025.
Read reviews from past customers who have flown Delta, Copa Airlines, and United Airlines from Chicago O'Hare Intl Airport to Buenos Aires. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,007 reviews

Boarding

8.1

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

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
8,007 reviews
Delta
7.9
Good
8,007 reviews

Boarding

8.1

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

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
1,565 reviews
Delta
7.9
Good
8,007 reviews

Boarding

8.1

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

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
9,015 reviews
Delta
7.9
Good
8,007 reviews

Boarding

8.1

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

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
11,050 reviews
Delta
7.9
Good
8,007 reviews

Boarding

8.1

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

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
2,475 reviews
Delta
7.9
Good
8,007 reviews

Boarding

8.1

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

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 O'Hare Intl 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 O'Hare Intl Airport to Buenos Aires?

    A quick flight from Chicago O'Hare Intl Airport to Buenos Aires can take about 14h 27m. Copa Airlines provides one of the quickest options available for as low as $902. Airlines will cover a distance of 5619 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Chicago O'Hare Intl Airport to Buenos Aires round-trip?

    Cheapflights users have booked flights from Chicago O'Hare Intl Airport to Buenos Aires round-trip from $360. Other airlines that can offer you cheap pricing are Copa Airlines, from $699, and Avianca, from $750. These flights start at 68% lower than the current average price 3 months from now.

  • Can I find deals for flights from O'Hare Intl to Buenos Aires that include hotel bookings?

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

  • How can I find direct flights from O'Hare Intl to Buenos Aires?

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

  • Can I find deals for business class flights from O'Hare Intl to Buenos Aires?

    Yes. Cheapflights offers flight deals from O'Hare Intl 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 O'Hare Intl Airport to Buenos Aires?

    Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Buenos Aires (average of $378). Flying from Chicago O'Hare Intl Airport 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

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Top 6 airlines flying from O'Hare Intl to Buenos Aires

Discover the top 6 airlines that operate flights from O'Hare Intl 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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
ArajetCheapest$360Average$884FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$699Average$1,014FlexibilityNo cancel feeOn-time70%
AviancaCheapest$750Average$1,120FlexibilityNo cancel feeOn-time71%
DeltaCheapest$951Average$1,195FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$975Average$1,173FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,015Average$1,249FlexibilityNo cancel feeOn-time71%

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