HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Buenos Aires

$270+ Cheap flights from Chicago (CHI) 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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BUE
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Chicago to Buenos Aires with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Chicago to Buenos Aires are usually found in October or November, booked 53 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from Chicago to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$769
(United Airlines)

One-way from

$270
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$1,006
Provider with most accurate pricing for Chicago (CHI)-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Buenos Aires (BUE) flights.
Search Deals
From Chicago (CHI) to Buenos Aires (BUE)
Search Deals
One-way flight from Chicago (CHI) to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Chicago to Buenos Aires

Cheapest flights from Chicago to Buenos Aires
Explore the most affordable flight options available from Chicago to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 2025.

This United Airlines deal was found by Cheapflights users on 11/2. 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.
Sat 11/159:08 pmORD - EZE
1 stop31h 12mUnited Airlines
Tue 11/2510:05 pmEZE - ORD
1 stop19h 49mUnited Airlines
Deal found 11/2$769
This Mytrip deal was found by Cheapflights users on 11/1. 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 11/296:48 amORD - EZE
3 stops19h 22mMultiple Airlines
Sat 12/65:25 amEZE - ORD
3 stops34h 22mMultiple Airlines
Deal found 11/1$774
This Mytrip deal was found by Cheapflights users on 11/1. 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 11/296:48 amORD - AEP
3 stops35h 12mMultiple Airlines
Sat 12/69:45 pmAEP - ORD
2 stops26h 25mMultiple Airlines
Deal found 11/1$784
This Copa Airlines deal was found by Cheapflights users on 11/2. 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 11/286:56 amORD - EZE
1 stop22h 03mCopa Airlines
Fri 12/512:07 amEZE - ORD
1 stop15h 45mCopa Airlines
Deal found 11/2$789
This Mytrip deal was found by Cheapflights users on 11/2. 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 12/28:20 amORD - AEP
3 stops44h 10mMultiple Airlines
Tue 12/95:45 amAEP - ORD
3 stops39h 51mMultiple Airlines
Deal found 11/2$790
This Orbitz deal was found by Cheapflights users on 11/2. 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.
Wed 11/1210:35 amORD - EZE
2 stops29h 08mLATAM Airlines
Tue 11/184:05 amEZE - ORD
2 stops21h 25mLATAM Airlines
Deal found 11/2$791
This Mytrip deal was found by Cheapflights users on 10/31. 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 11/1610:20 pmORD - EZE
1 stop14h 30mMultiple Airlines
Tue 11/182:40 amEZE - ORD
2 stops34h 55mMultiple Airlines
Deal found 10/31$792
This Mytrip deal was found by Cheapflights users on 11/2. 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 11/105:10 amORD - EZE
3 stops21h 00mMultiple Airlines
Tue 11/182:40 amEZE - ORD
2 stops34h 55mMultiple Airlines
Deal found 11/2$802
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 11/195:45 amORD - EZE
1 stop15h 20mMultiple Airlines
Wed 12/37:30 amEZE - ORD
2 stops31h 53mMultiple Airlines
Deal found 11/2$803
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 12/107:33 amORD - EZE
1 stop14h 25mCopa Airlines
Wed 12/2412:07 amEZE - ORD
1 stop15h 45mCopa Airlines
Deal found 11/2$804
This Kiwi.com deal was found by Cheapflights users on 11/2. 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.
Tue 12/211:40 amORD - EZE
1 stop18h 55mMultiple Airlines
Mon 12/81:40 amEZE - ORD
2 stops21h 21mMultiple Airlines
Deal found 11/2$808
This Delta deal was found by Cheapflights users on 11/1. 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 12/145:13 pmMDW - EZE
1 stop12h 47mDelta
Sun 12/288:55 pmEZE - MDW
1 stop15h 10mDelta
Deal found 11/1$811

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago 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 3, 2025.
Use the filters below to find and compare flights from Chicago to Buenos Aires that are best for you.

Fly from

Chicago

Fly to

Buenos Aires

Route

Depart

Return

Price

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 11/20

9:08 pm-7:20 am

1 stop31h 12m

Buenos Aires Ministro Pistarini

Mon 12/1

11:55 pm-7:46 pm

1 stop22h 51m

$769

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 11/15

6:56 am-12:53 am

1 stop14h 57m

Buenos Aires Ministro Pistarini

Tue 11/25

2:34 pm-12:46 pm

1 stop25h 12m

$769

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 11/15

9:08 pm-7:20 am

1 stop31h 12m

Buenos Aires Ministro Pistarini

Tue 11/18

11:55 pm-12:16 pm

1 stop15h 21m

$769

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 11/20

9:08 pm-7:20 am

1 stop31h 12m

Buenos Aires Ministro Pistarini

Tue 12/2

10:05 pm-11:11 am

1 stop16h 06m

$769

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 11/20

9:08 pm-7:20 am

1 stop31h 12m

Buenos Aires Ministro Pistarini

Thu 11/27

10:05 pm-5:08 pm

1 stop22h 03m

$769

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sat 11/15

7:55 pm-7:20 am

1 stop32h 25m

Buenos Aires Ministro Pistarini

Sat 11/22

11:55 pm-12:16 pm

1 stop15h 21m

$769

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Tue 12/9

11:15 am-9:00 am

1 stop18h 45m

Buenos Aires Ministro Pistarini

Sun 12/28

11:55 pm-3:13 pm

1 stop18h 18m

$811

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 12/5

6:45 am-7:20 am

2 stops21h 35m

Buenos Aires Ministro Pistarini

Sat 12/27

11:55 pm-4:19 pm

1 stop19h 24m

$815

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Sat 1/24

4:30 pm-9:00 am

1 stop13h 30m

Buenos Aires Ministro Pistarini

Thu 2/12

8:55 pm-9:58 am

1 stop16h 03m

$832

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

Sat 1/17

11:21 am-7:20 am

1 stop16h 59m

Buenos Aires Ministro Pistarini

Mon 2/9

11:55 pm-12:01 pm

1 stop15h 06m

$832

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 60 results
1
2
3
...
6

Compare providers for flights from Chicago 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 Chicago to Buenos Aires in November.
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
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-Buenos Aires flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Chicago-Buenos Aires flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Chicago-Buenos Aires flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-Buenos Aires flights, Cheapflights users trust eDreams the most. eDreams 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-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 Chicago to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Chicago 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 to Buenos Aires

How far ahead should I book a flight from Chicago to Buenos Aires?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Buenos Aires. Price data was last updated on October 31, 2025.

The best time to book flights from Chicago to Buenos Aires is 53 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 to Buenos Aires?

Currently, October is the cheapest month in which you can book a flight from Chicago to Buenos Aires (average of $380). Flying from Chicago 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 CHI to BUE?

Find hourly flight availability from Chicago 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 3, 2025.

One of the essential ways to save on airfare from Chicago to Buenos Aires is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 11% on airfare.

What is the cheapest day to fly from Chicago to Buenos Aires?

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

Travelers seeking maximum savings on their Chicago 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 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 3, 2025.
Peruse reviews from past customers who have flown with Delta, Copa Airlines, and United Airlines from Chicago to Buenos Aires to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
Delta
7.9
Good
8,001 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
Copa Airlines
7.6
Good
1,561 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
United Airlines
7.4
Good
8,997 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
American Airlines
7.2
Good
11,036 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
Avianca
6.6
Okay
2,467 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.

Related info for your journey

Find useful and relevant information for your journey from Chicago 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 to Buenos Aires?

    For as low as $769, United Airlines can have you in Buenos Aires from Chicago in 14h 57m. Airlines will cover a distance of 5619 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Chicago to Buenos Aires round-trip?

    Cheapflights users have booked flights from Chicago to Buenos Aires round-trip from $360. Other airlines that can offer you cheap pricing are Copa Airlines, from $699, and Avianca, from $750. Users have found that Arajet is 67% cheaper than the other options available to this destination.

  • What are the most popular routes from Chicago to Buenos Aires?

    The most popular route from Chicago to Buenos Aires is Chicago O'Hare Intl - Buenos Aires Ministro Pistarini. You may also consider Chicago O'Hare Intl - Buenos Aires Jorge Newbery or Chicago Midway - Buenos Aires Ministro Pistarini.

  • Can I find deals for flights from Chicago to Buenos Aires that include hotel bookings?

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

  • How can I find direct flights from Chicago to Buenos Aires?

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

  • Can I find deals for business class flights from Chicago to Buenos Aires?

    Yes. Cheapflights offers flight deals from Chicago 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 to Buenos Aires?

    Currently, October is the cheapest month in which you can book a flight from Chicago to Buenos Aires (average of $380). Flying from Chicago 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Chicago to Buenos Aires

Discover the top 6 airlines that operate flights from Chicago 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 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
ArajetCheapest$360Average$884FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$699Average$1,019FlexibilityNo cancel feeOn-time70%
AviancaCheapest$750Average$1,146FlexibilityNo cancel feeOn-time71%
DeltaCheapest$951Average$1,197FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$975Average$1,173FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,015Average$1,248FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.