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$312+ 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUE
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$723
(Avianca)

One-way from

$312
(Mytrip)

Popular in

December

Cheapest in

March

Average price

$1,173
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. 2% potential increase in price ($28 potential increase over avg. RT price).
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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 June 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 June 12, 2025.

This Flysmarter deal was found by Cheapflights users on 6/12. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/72:35 pmORD - EZE
1 stop13h 10mAvianca
Tue 8/191:40 amEZE - ORD
1 stop13h 35mAvianca
Deal found 6/12$722
This Copa Airlines deal was found by Cheapflights users on 6/11. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/87:54 amORD - EZE
1 stop15h 01mCopa Airlines
Wed 11/1211:01 amEZE - ORD
1 stop15h 20mCopa Airlines
Deal found 6/11$725
This LATAM Airlines deal was found by Cheapflights users on 6/10. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/205:45 amORD - EZE
2 stops22h 10mLATAM Airlines
Mon 8/255:30 amEZE - ORD
2 stops29h 09mLATAM Airlines
Deal found 6/10$762
This Arajet deal was found by Cheapflights users on 6/9. 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 Arajet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1310:27 amORD - EZE
1 stop14h 18mArajet
Tue 12/2311:07 amEZE - ORD
1 stop14h 33mArajet
Deal found 6/9$775
This Mytrip deal was found by Cheapflights users on 6/10. 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 10/242:35 pmORD - EZE
2 stops36h 15mMultiple Airlines
Sun 11/168:40 amEZE - ORD
1 stop15h 30mMultiple Airlines
Deal found 6/10$814
This Air Canada deal was found by Cheapflights users on 6/11. 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 9/163:35 pmORD - EZE
2 stops20h 55mAir Canada
Tue 2/175:00 pmEZE - ORD
2 stops20h 39mAir Canada
Deal found 6/11$862
This Mytrip deal was found by Cheapflights users on 6/10. 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 10/242:35 pmORD - AEP
2 stops23h 55mMultiple Airlines
Sat 11/1512:05 amAEP - ORD
2 stops24h 05mMultiple Airlines
Deal found 6/10$864
This LATAM Airlines deal was found by Cheapflights users on 6/10. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:00 amORD - AEP
2 stops20h 05mLATAM Airlines
Sun 11/165:10 pmAEP - ORD
2 stops18h 24mLATAM Airlines
Deal found 6/10$949
This Orbitz deal was found by Cheapflights users on 6/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/269:15 amORD - AEP
2 stops18h 25mAvianca
Sun 11/27:00 amAEP - ORD
1 stop32h 15mAvianca
Deal found 6/11$991

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 June 12, 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

Wed 7/9

2:35 pm-5:45 am

1 stop13h 10m

Buenos Aires Ministro Pistarini

Wed 8/27

1:40 am-1:15 pm

1 stop13h 35m

$723

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 10/8

7:54 am-12:55 am

1 stop15h 01m

Buenos Aires Ministro Pistarini

Wed 11/12

11:01 am-11:21 pm

1 stop15h 20m

$725

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 8/20

5:45 am-5:55 am

2 stops22h 10m

Buenos Aires Ministro Pistarini

Mon 8/25

5:30 am-8:39 am

2 stops29h 09m

$762

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 10/24

2:35 pm-4:50 am

2 stops36h 15m

Buenos Aires Ministro Pistarini

Sun 11/16

8:40 am-9:10 pm

1 stop15h 30m

$814

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 9/16

3:35 pm-2:30 pm

2 stops20h 55m

Buenos Aires Ministro Pistarini

Tue 2/17

5:00 pm-10:39 am

2 stops20h 39m

$862

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Thu 8/14

5:05 am-9:00 pm

3 stops37h 55m

Buenos Aires Jorge Newbery

Thu 8/21

12:05 am-2:16 pm

3 stops40h 11m

$898

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Tue 7/22

5:25 pm-5:40 am

2 stops34h 15m

Buenos Aires Jorge Newbery

Tue 7/29

7:00 am-2:25 pm

3 stops33h 25m

$1,002

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 10/15

8:55 am-9:45 am

2 stops22h 50m

Buenos Aires Ministro Pistarini

Wed 10/29

3:45 am-11:53 pm

2 stops22h 08m

$1,010

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 9/16

2:20 pm-8:00 am

1 stop15h 40m

Buenos Aires Ministro Pistarini

Tue 2/17

11:55 pm-10:36 pm

1 stop25h 41m

$1,016

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Thu 8/7

5:59 pm-6:35 pm

2 stops22h 36m

Buenos Aires Jorge Newbery

Sat 8/16

5:00 pm-10:04 am

2 stops19h 04m

$1,065

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 25 results
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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 June 9, 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 June 12, 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 June 12, 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
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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
1,785 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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
1,451 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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!
Aeromexico
7.5
Good
1,706 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

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 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 $723. Other airlines that can offer you cheap pricing are Copa Airlines, from $725, and LATAM Airlines, from $762. These flights start at 38% 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?

    $324 is the cheapest one-way deal found within the past few days, from Arajet. You may also be able to find cheap deals on Avianca and Air Canada, with prices starting from $356 and $509, 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$722Average$1,116FlexibilityNo cancel feeOn-time70%
AviancaCheapest$750Average$1,186FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,023Average$1,215FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$1,023Average$1,251FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,093Average$1,238FlexibilityNo cancel feeOn-time69%

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