HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Buenos Aires

$305+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BUE
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
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 September or July, 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 julio 31, 2025.

Round-trip from

$702
(LATAM Airlines)

One-way from

$305
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$1,035
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. 9% potential increase in price ($120 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 julio 31, 2025.

This LATAM Airlines deal was found by Cheapflights users on 7/30. 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.
dom. 9/76:00 pmORD - EZE
2 stops29h 25mLATAM Airlines
sáb. 9/133:55 amEZE - ORD
2 stops21h 59mLATAM Airlines
Deal found 7/30$702
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/234:35 amORD - EZE
1 stop16h 30mArajet
mar. 3/311:07 amEZE - ORD
1 stop14h 33mArajet
Deal found 7/29$712
This Mytrip deal was found by Cheapflights users on 7/30. 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.
jue. 9/116:30 amORD - AEP
3 stops33h 00mMultiple Airlines
jue. 9/1810:55 amAEP - ORD
3 stops37h 03mMultiple Airlines
Deal found 7/30$818
This Mytrip deal was found by Cheapflights users on 7/29. 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.
lun. 11/310:27 amORD - EZE
2 stops20h 40mMultiple Airlines
lun. 12/159:15 pmEZE - ORD
2 stops27h 08mMultiple Airlines
Deal found 7/29$831
This LATAM Airlines deal was found by Cheapflights users on 7/29. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/14:23 pmMDW - EZE
2 stops20h 32mLATAM Airlines
dom. 11/92:45 pmEZE - MDW
2 stops24h 10mLATAM Airlines
Deal found 7/29$832
This Copa Airlines deal was found by Cheapflights users on 7/29. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/126:56 amORD - EZE
1 stop15h 02mCopa Airlines
jue. 11/2010:01 amEZE - ORD
1 stop17h 04mCopa Airlines
Deal found 7/29$886
This Gotogate deal was found by Cheapflights users on 7/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/228:25 pmORD - EZE
2 stops40h 05mAir Canada
lun. 10/64:35 pmEZE - ORD
3 stops29h 36mAir Canada
Deal found 7/31$921
This Delta deal was found by Cheapflights users on 7/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/166:30 pmMDW - EZE
1 stop13h 15mDelta
mar. 2/178:55 pmEZE - MDW
1 stop16h 01mDelta
Deal found 7/31$929
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/149:47 amORD - EZE
1 stop21h 58mDelta
jue. 8/288:10 pmEZE - ORD
1 stop15h 55mDelta
Deal found 7/29$929
This LATAM Airlines deal was found by Cheapflights users on 7/30. 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.
jue. 9/116:30 pmMDW - AEP
2 stops17h 30mLATAM Airlines
jue. 9/182:55 pmAEP - MDW
2 stops22h 53mLATAM Airlines
Deal found 7/30$929
This LATAM Airlines deal was found by Cheapflights users on 7/30. 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.
jue. 9/255:31 pmORD - AEP
2 stops21h 29mLATAM Airlines
jue. 10/25:00 pmAEP - ORD
2 stops21h 24mLATAM Airlines
Deal found 7/30$929
This Mytrip deal was found by Cheapflights users on 7/30. 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.
dom. 9/79:35 amMDW - EZE
3 stops26h 55mMultiple Airlines
dom. 9/147:40 amEZE - MDW
3 stops34h 44mMultiple Airlines
Deal found 7/30$1,251

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 julio 31, 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

dom. 9/7

6:00 pm-1:25 am

2 stops29h 25m

Buenos Aires Ministro Pistarini

sáb. 9/13

3:55 am-11:54 pm

2 stops21h 59m

$702

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

jue. 9/11

6:30 am-5:30 pm

3 stops33h 00m

Buenos Aires Jorge Newbery

jue. 9/18

10:55 am-9:58 pm

3 stops37h 03m

$818

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

lun. 8/18

5:16 pm-3:25 am

3 stops32h 09m

Buenos Aires Ministro Pistarini

mié. 8/27

9:15 pm-11:59 pm

3 stops28h 44m

$832

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

mar. 8/12

7:55 am-3:57 am

1 stop18h 02m

Buenos Aires Ministro Pistarini

lun. 8/18

3:48 am-12:21 am

1 stop22h 33m

$886

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

jue. 9/11

10:35 am-5:55 am

2 stops17h 20m

Buenos Aires Ministro Pistarini

lun. 9/22

5:30 am-9:40 am

2 stops30h 10m

$916

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

lun. 9/22

8:25 pm-2:30 pm

2 stops40h 05m

Buenos Aires Ministro Pistarini

lun. 10/6

4:35 pm-8:11 pm

3 stops29h 36m

$921

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

mar. 9/16

6:30 pm-9:45 am

1 stop13h 15m

Buenos Aires Ministro Pistarini

mar. 2/17

8:55 pm-9:56 am

1 stop16h 01m

$929

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

jue. 8/14

9:47 am-9:45 am

1 stop21h 58m

Buenos Aires Ministro Pistarini

mié. 8/27

8:10 pm-10:05 am

1 stop15h 55m

$929

ChicagoBuenos Aires

MDW - AEP

MDWAEP

Chicago Midway

jue. 9/11

6:30 pm-2:00 pm

2 stops17h 30m

Buenos Aires Jorge Newbery

jue. 9/18

2:55 pm-11:48 am

2 stops22h 53m

$929

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

jue. 9/25

5:31 pm-5:00 pm

2 stops21h 29m

Buenos Aires Jorge Newbery

jue. 10/2

5:00 pm-12:24 pm

2 stops21h 24m

$929

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 24 results
1
2
3

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 July 25, 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, April is the cheapest month in which you can book a flight from Chicago to Buenos Aires (average of $795). Flying from Chicago 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 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 julio 31, 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 at noon tend to be the most expensive. A flight in the evening could potentially save you up to 14% 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 October 13, 2024.

Travelers seeking maximum savings on their Chicago to Buenos Aires flight should consider departing on Tuesday evenings when fares are most often at their lowest. Thursday evenings 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 julio 31, 2025.
Peruse reviews from past customers who have flown with Delta, LATAM Airlines, and Copa 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
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
1,822 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
1,493 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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!
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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!
GOL
7.3
Good
1,091 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

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 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.

  • 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 $702. Other airlines that can offer you cheap pricing are Copa Airlines, from $886, and Air Canada, from $921. Users have found that LATAM Airlines is 39% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Chicago to Buenos Aires one-way?

    $451 is the cheapest one-way deal found within the past few days, from Avianca. You may also be able to find cheap deals on GOL and Delta, with prices starting from $487 and $708, respectively.

  • 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, April is the cheapest month in which you can book a flight from Chicago to Buenos Aires (average of $795). Flying from Chicago 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

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 5 airlines flying from Chicago to Buenos Aires

Discover the top 5 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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$699Average$1,076FlexibilityNo cancel feeOn-time70%
AviancaCheapest$753Average$1,175FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,023Average$1,202FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$1,023Average$1,252FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,072Average$1,230FlexibilityNo cancel feeOn-time69%

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.