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$245+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUE
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
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

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 December 28, 2025.

This Booking.com deal was found by Cheapflights users on 12/26. 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.
Mon 12/295:45 amORD - EZE
1 stop15h 20mMultiple Airlines
Thu 1/81:40 amEZE - ORD
1 stop21h 40mMultiple Airlines
Deal found 12/26$1,147
This Expedia deal was found by Cheapflights users on 12/26. 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.
Mon 12/2910:20 pmORD - EZE
2 stops51h 50mAvianca
Thu 1/81:40 amEZE - ORD
1 stop21h 40mAvianca
Deal found 12/26$1,290
This United Airlines deal was found by Cheapflights users on 12/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2811:35 amORD - EZE
1 stop18h 45mUnited Airlines
Sun 1/1111:55 pmEZE - ORD
1 stop24h 31mUnited Airlines
Deal found 12/25$1,301
This KAYAK deal was found by Cheapflights users on 12/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/285:30 amORD - EZE
2 stops21h 35mLATAM Airlines
Sun 1/1110:25 pmEZE - ORD
1 stop22h 20mLATAM Airlines
Deal found 12/25$1,398
This United Airlines deal was found by Cheapflights users on 12/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/268:54 amORD - EZE
1 stop19h 26mUnited Airlines
Sat 1/1011:55 pmEZE - ORD
1 stop26h 03mUnited Airlines
Deal found 12/25$1,402
This American Airlines deal was found by Cheapflights users on 12/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/284:05 pmORD - EZE
2 stops15h 35mAmerican Airlines
Sun 1/1111:59 pmEZE - ORD
1 stop21h 11mAmerican Airlines
Deal found 12/26$1,565
This Orbitz deal was found by Cheapflights users on 12/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:20 pmORD - EZE
1 stop28h 30mAvianca
Sat 1/104:55 pmEZE - ORD
2 stops53h 00mAvianca
Deal found 12/25$1,578
This United Airlines deal was found by Cheapflights users on 12/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2812:50 pmORD - EZE
1 stop17h 30mUnited Airlines
Mon 1/511:55 pmEZE - ORD
1 stop24h 31mUnited Airlines
Deal found 12/26$1,586
This Delta deal was found by Cheapflights users on 12/25. 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.
Sun 12/281:35 pmORD - EZE
2 stops16h 25mDelta
Sun 1/1110:25 pmEZE - ORD
2 stops22h 01mDelta
Deal found 12/25$1,605
This Justfly.com deal was found by Cheapflights users on 12/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:20 pmORD - AEP
1 stop28h 20mAvianca
Fri 1/97:00 amAEP - ORD
1 stop16h 20mAvianca
Deal found 12/26$1,649
This United Airlines deal was found by Cheapflights users on 12/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/269:23 pmORD - EZE
1 stop30h 57mUnited Airlines
Fri 1/910:05 pmEZE - ORD
1 stop15h 02mUnited Airlines
Deal found 12/26$1,682
This KAYAK deal was found by Cheapflights users on 12/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:00 amORD - AEP
2 stops18h 55mLATAM Airlines
Fri 1/95:15 pmAEP - ORD
2 stops19h 52mLATAM Airlines
Deal found 12/26$1,952

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 December 28, 2025.

Most accurate provider

OneTravel
3 stars

Most trusted provider

OneTravel
3 stars

Round-trip from

$767
(Gotogate)

One-way from

$245
(eDestinos)

Popular in

December

Cheapest in

November

Average price

$1,333
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. 0% potential increase in price ($8 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($18 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 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 December 28, 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 - EZE

ORDEZE

Chicago O'Hare Intl

Tue 5/12

3:40 pm-2:30 pm

2 stops20h 50m

Buenos Aires Ministro Pistarini

Thu 5/21

4:35 pm-2:55 pm

3 stops24h 20m

$864

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 4/29

5:35 am-12:05 am

1 stop16h 30m

Buenos Aires Ministro Pistarini

Sun 5/3

8:40 am-10:10 pm

1 stop15h 30m

$871

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 3/11

1:37 pm-9:15 am

2 stops17h 38m

Buenos Aires Ministro Pistarini

Tue 3/17

8:55 pm-10:00 am

1 stop15h 05m

$877

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Sat 1/24

5:15 am-7:30 am

2 stops23h 15m

Buenos Aires Jorge Newbery

Thu 2/5

12:10 am-8:20 pm

2 stops23h 10m

$903

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Mon 1/19

10:20 pm-3:50 pm

1 stop14h 30m

Buenos Aires Ministro Pistarini

Sun 1/25

1:40 am-8:20 pm

1 stop21h 40m

$907

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 2/25

7:34 am-1:04 am

1 stop14h 30m

Buenos Aires Ministro Pistarini

Tue 3/3

3:47 am-12:04 am

1 stop23h 17m

$910

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 3/26

8:34 am-1:02 am

1 stop14h 28m

Buenos Aires Ministro Pistarini

Sun 3/29

2:52 pm-1:46 pm

1 stop24h 54m

$910

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 5/8

8:45 am-2:30 pm

2 stops27h 45m

Buenos Aires Ministro Pistarini

Wed 5/13

4:35 pm-8:08 pm

2 stops29h 33m

$923

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 2/19

2:22 pm-7:57 am

1 stop14h 35m

Buenos Aires Ministro Pistarini

Thu 2/26

9:16 am-12:04 am

1 stop17h 48m

$930

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sun 2/22

7:34 am-7:57 am

1 stop21h 23m

Buenos Aires Ministro Pistarini

Sun 3/1

9:16 am-12:04 am

1 stop17h 48m

$930

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OneTravelPrice Accuracy3 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 December 26, 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 $379). 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 December 28, 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
8,016 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

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
8,016 reviews
Delta
7.9
Good
8,016 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

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
1,561 reviews
Delta
7.9
Good
8,016 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

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
9,114 reviews
Delta
7.9
Good
8,016 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

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
11,070 reviews
Delta
7.9
Good
8,016 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

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
2,488 reviews
Delta
7.9
Good
8,016 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

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 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 16h 30m. Air Canada provides one of the quickest options available for as low as $871. 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 $726. 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 $379). 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
ArajetCheapest$360Average$894FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$699Average$963FlexibilityNo cancel feeOn-time70%
AviancaCheapest$750Average$998FlexibilityNo cancel feeOn-time71%
DeltaCheapest$951Average$1,229FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$951Average$1,164FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,015Average$1,258FlexibilityNo cancel feeOn-time71%

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