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$233+ 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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUE
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
1 adult, Economy
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Cheap 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 February 11, 2026.

This Mytrip deal was found by Cheapflights users on 2/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1710:55 am
ORD
-
AEP
2 stops16h 45m
Multiple Airlines
Tue 3/247:00 am
AEP
-
ORD
2 stops27h 25m
Multiple Airlines
Deal found 2/10$908
This Air Canada deal was found by Cheapflights users on 2/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:01 pm
ORD
-
EZE
3 stops42h 29m
Air Canada
Sat 5/94:35 pm
EZE
-
ORD
3 stops41h 25m
Air Canada
Deal found 2/11$909
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 10/96:45 am
ORD
-
EZE
2 stops19h 15m
Multiple Airlines
Sun 12/138:40 am
EZE
-
ORD
1 stop15h 40m
Multiple Airlines
Deal found 2/8$911
This Mytrip deal was found by Cheapflights users on 2/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1511:20 pm
ORD
-
AEP
2 stops19h 20m
Multiple Airlines
Sun 5/242:45 pm
AEP
-
ORD
2 stops32h 35m
Multiple Airlines
Deal found 2/10$911
This Mytrip deal was found by Cheapflights users on 2/9. 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 4/1011:20 pm
ORD
-
EZE
3 stops33h 13m
Multiple Airlines
Sat 4/184:02 pm
EZE
-
ORD
3 stops31h 18m
Multiple Airlines
Deal found 2/9$912
This Delta deal was found by Cheapflights users on 2/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/309:40 am
ORD
-
EZE
1 stop22h 05m
Delta
Wed 4/88:10 pm
EZE
-
ORD
1 stop29h 44m
Delta
Deal found 2/9$913
This Mytrip deal was found by Cheapflights users on 2/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1711:20 pm
ORD
-
AEP
2 stops20h 00m
Multiple Airlines
Sun 5/242:45 pm
AEP
-
ORD
2 stops32h 35m
Multiple Airlines
Deal found 2/10$913
This Mytrip deal was found by Cheapflights users on 2/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1711:20 pm
ORD
-
EZE
3 stops26h 40m
Multiple Airlines
Sat 5/232:30 am
EZE
-
ORD
2 stops21h 40m
Multiple Airlines
Deal found 2/10$914
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Thu 4/303:52 pm
ORD
-
EZE
1 stop14h 43m
Multiple Airlines
Fri 5/89:15 pm
EZE
-
ORD
1 stop14h 42m
Multiple Airlines
Deal found 2/9$915
This Mytrip deal was found by Cheapflights users on 2/9. 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.
Sun 5/1711:20 pm
ORD
-
AEP
2 stops20h 00m
Multiple Airlines
Wed 5/273:55 pm
AEP
-
ORD
2 stops31h 25m
Multiple Airlines
Deal found 2/9$915
This Delta deal was found by Cheapflights users on 2/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:53 pm
ORD
-
EZE
1 stop13h 52m
Delta
Tue 5/128:10 pm
EZE
-
ORD
1 stop14h 22m
Delta
Deal found 2/9$916
This Delta deal was found by Cheapflights users on 2/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/208:10 am
ORD
-
EZE
1 stop23h 35m
Delta
Thu 6/48:10 pm
EZE
-
ORD
1 stop22h 39m
Delta
Deal found 2/9$917

Find 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 February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$908
(Mytrip)

One-way from

$233
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,122
Provider with most accurate pricing for Chicago O'Hare Intl-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago O'Hare Intl-Buenos Aires (BUE) flights.
Search Deals
From Chicago O'Hare Intl to Buenos Aires (BUE)
Search Deals
One-way flight from Chicago O'Hare Intl to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 11, 2026.
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 - EZE

ORDEZE

Chicago O'Hare Intl

Tue 3/31

11:10 am-9:45 am

1 stop20h 35m

Buenos Aires Ministro Pistarini

Thu 4/9

7:45 am-11:54 pm

2 stops18h 09m

$913

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 3/30

5:59 pm-9:45 am

1 stop13h 46m

Buenos Aires Ministro Pistarini

Thu 4/9

8:10 pm-8:30 am

1 stop14h 20m

$913

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 4/29

8:15 am-6:10 am

2 stops19h 55m

Buenos Aires Ministro Pistarini

Mon 5/11

8:10 pm-8:32 am

1 stop14h 22m

$916

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 4/30

11:19 am-9:45 am

1 stop20h 26m

Buenos Aires Ministro Pistarini

Tue 5/12

8:10 pm-8:32 am

1 stop14h 22m

$916

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 3/9

5:59 pm-9:00 am

1 stop13h 01m

Buenos Aires Ministro Pistarini

Mon 4/13

3:55 am-11:59 pm

2 stops22h 04m

$917

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 5/20

7:30 am-8:00 am

1 stop22h 30m

Buenos Aires Ministro Pistarini

Tue 6/2

9:00 pm-8:01 pm

1 stop25h 01m

$917

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Wed 5/20

8:10 am-7:40 am

2 stops21h 30m

Buenos Aires Jorge Newbery

Mon 6/1

10:35 am-12:21 pm

2 stops27h 46m

$917

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 5/20

8:10 am-9:45 am

1 stop23h 35m

Buenos Aires Ministro Pistarini

Mon 6/1

8:10 pm-8:32 am

1 stop14h 22m

$917

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 5/19

8:10 am-9:45 am

1 stop23h 35m

Buenos Aires Ministro Pistarini

Thu 6/4

8:10 pm-1:47 pm

1 stop19h 37m

$917

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 6/3

9:44 am-9:45 am

1 stop22h 01m

Buenos Aires Ministro Pistarini

Wed 6/10

8:10 pm-10:04 am

1 stop15h 54m

$917

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/10

Showing 1-10 of 42 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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OneTravelPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice 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 O'Hare Intl Airport-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 O'Hare Intl Airport-Buenos Aires flight deals on Cheapflights vs. FlightHub >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 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 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 February 6, 2026.

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 $380). 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.

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 February 11, 2026.
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
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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
8,180 reviews
Delta
7.9
Good
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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
1,557 reviews
Delta
7.9
Good
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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
9,273 reviews
Delta
7.9
Good
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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
11,266 reviews
Delta
7.9
Good
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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
2,497 reviews
Delta
7.9
Good
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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 20h 35m. Delta provides one of the quickest options available for as low as $913. 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 $569, and Avianca, from $750. These flights start at 68% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport 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.

  • 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 $380). 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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
ArajetCheapest$360Average$878FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$569Average$966FlexibilityNo cancel feeOn-time70%
AviancaCheapest$750Average$990FlexibilityNo cancel feeOn-time71%
DeltaCheapest$951Average$1,315FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$951Average$1,140FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,015Average$1,256FlexibilityNo cancel feeOn-time71%

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