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$282+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUE
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to Buenos Aires are usually found in March or July, booked 89 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 April 30, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$884
(Kiwi.com)

One-way from

$282
(Avianca)

Popular in

December

Cheapest in

March

Average price

$1,245
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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Highest demand for flights based on searches. 3% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Mon 5/262:35 pmORD - EZE
1 stop22h 45mMultiple Airlines
Fri 6/62:13 amEZE - ORD
2 stops19h 50mMultiple Airlines
Deal found 4/28$884
This Avianca deal was found by Cheapflights users on 4/28. 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 7/155:25 pmORD - EZE
3 stops30h 00mAvianca
Fri 9/51:40 amEZE - ORD
1 stop13h 35mAvianca
Deal found 4/28$885
This Mytrip deal was found by Cheapflights users on 4/29. 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 5/315:05 amORD - AEP
3 stops34h 15mMultiple Airlines
Sun 6/811:40 amAEP - ORD
3 stops38h 25mMultiple Airlines
Deal found 4/29$886
This Copa Airlines deal was found by Cheapflights users on 4/28. 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.
Fri 7/47:54 amORD - EZE
1 stop15h 08mCopa Airlines
Thu 7/1012:06 amEZE - ORD
1 stop15h 36mCopa Airlines
Deal found 4/28$902
This Air Canada deal was found by Cheapflights users on 4/29. 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.
Wed 5/73:35 pmORD - EZE
2 stops20h 55mAir Canada
Wed 6/44:35 pmEZE - ORD
2 stops24h 12mAir Canada
Deal found 4/29$906
This LATAM Airlines deal was found by Cheapflights users on 4/28. 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 9/249:30 amORD - EZE
2 stops18h 40mLATAM Airlines
Wed 10/112:48 pmEZE - ORD
2 stops26h 30mLATAM Airlines
Deal found 4/28$1,025
This LATAM Airlines deal was found by Cheapflights users on 4/28. 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 9/246:10 pmORD - AEP
2 stops19h 50mLATAM Airlines
Tue 10/73:40 pmAEP - ORD
2 stops23h 38mLATAM Airlines
Deal found 4/28$1,025
This Priceline deal was found by Cheapflights users on 4/29. 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.
Fri 8/153:45 pmORD - AEP
2 stops35h 55mAvianca
Fri 8/227:00 amAEP - ORD
1 stop32h 15mAvianca
Deal found 4/29$1,061
This Ovago deal was found by Cheapflights users on 4/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/273:22 pmORD - AEP
2 stops19h 58mGOL
Fri 10/33:40 amAEP - ORD
2 stops20h 54mGOL
Deal found 4/28$1,128

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 April 30, 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

Mon 5/26

2:35 pm-3:20 pm

1 stop22h 45m

Buenos Aires Ministro Pistarini

Fri 6/6

2:13 am-8:03 pm

2 stops19h 50m

$884

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 7/15

5:25 pm-1:25 am

3 stops30h 00m

Buenos Aires Ministro Pistarini

Thu 9/4

4:45 pm-1:15 pm

1 stop22h 30m

$885

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Sat 5/31

5:05 am-5:20 pm

3 stops34h 15m

Buenos Aires Jorge Newbery

Sun 6/8

11:40 am-12:05 am

3 stops38h 25m

$886

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 7/4

7:54 am-1:02 am

1 stop15h 08m

Buenos Aires Ministro Pistarini

Thu 7/10

12:06 am-1:42 pm

1 stop15h 36m

$902

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sun 5/25

10:40 am-2:30 pm

2 stops25h 50m

Buenos Aires Ministro Pistarini

Thu 6/5

4:35 pm-9:52 am

2 stops19h 17m

$911

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 9/24

9:30 am-6:10 am

2 stops18h 40m

Buenos Aires Ministro Pistarini

Wed 10/1

12:48 pm-1:18 pm

2 stops26h 30m

$1,025

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Wed 9/24

6:10 pm-4:00 pm

2 stops19h 50m

Buenos Aires Jorge Newbery

Wed 10/1

2:55 pm-12:52 pm

2 stops23h 57m

$1,025

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 6/11

1:57 am-9:25 pm

1 stop17h 28m

Buenos Aires Ministro Pistarini

Thu 6/19

11:25 pm-2:10 pm

1 stop16h 45m

$1,048

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Fri 8/15

3:45 pm-5:40 am

2 stops35h 55m

Buenos Aires Jorge Newbery

Fri 8/22

7:00 am-1:15 pm

1 stop32h 15m

$1,061

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Sat 9/27

3:22 pm-1:20 pm

2 stops19h 58m

Buenos Aires Jorge Newbery

Fri 10/3

3:40 am-10:34 pm

2 stops20h 54m

$1,128

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 21 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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OneTravelPrice 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Chicago O'Hare Intl Airport-Buenos Aires flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 April 25, 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Buenos Aires is 89 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, April is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Buenos Aires (average of $795). Flying from Chicago O'Hare Intl Airport 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 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 April 30, 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 afternoon, 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 June 2, 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. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Buenos Aires by month

Plan your trip to Buenos Aires by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Buenos Aires ranges from 2.0 - 3.9 inches per month. January is typically the wettest month, when rainfall can reach 3.9 in. June is typically the driest time to visit Buenos Aires when rainfall is around 2.0 in.

Temperature in Buenos Aires by month

Plan your trip to Buenos Aires by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Buenos Aires, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 51.8 F).

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 April 30, 2025.
Get a feel of what it's like to fly with Delta, LATAM Airlines and Copa Airlines from Chicago to Buenos Aires by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,936 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
LATAM Airlines
7.5
Good
1,767 reviews
Delta
8.0
Very good
7,936 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Copa Airlines
7.5
Good
1,411 reviews
Delta
8.0
Very good
7,936 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aeromexico
7.5
Good
1,698 reviews
Delta
8.0
Very good
7,936 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
GOL
7.3
Good
1,068 reviews
Delta
8.0
Very good
7,936 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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 $885. Other airlines that can offer you cheap pricing are Copa Airlines, from $902, and Air Canada, from $911. These flights start at 25% 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?

    $282 is the cheapest one-way deal found within the past few days, from Avianca. You may also be able to find cheap deals on Air Canada and LATAM Airlines, with prices starting from $538 and $703, 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, April is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Buenos Aires (average of $795). Flying from Chicago O'Hare Intl Airport 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

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Top 5 airlines flying from O'Hare Intl to Buenos Aires

Discover the top 5 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$750Average$1,274FlexibilityNo cancel feeOn-time71%
Copa AirlinesCheapest$957Average$1,137FlexibilityNo cancel feeOn-time70%
DeltaCheapest$1,013Average$1,194FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$1,023Average$1,259FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,072Average$1,255FlexibilityNo cancel feeOn-time69%

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