Buenos Aires

$193+ Cheap flights from Illinois 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUE
Nov 7 — Nov 141
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Find flight deals from Illinois to Buenos Aires

Cheapest flights from Illinois to Buenos Aires
Explore the most affordable flight options available from Illinois to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 8, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/7. 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.
Fri 12/56:45 amORD - EZE
2 stops20h 05mMultiple Airlines
Thu 12/117:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 10/7$769
This Kiwi.com deal was found by Cheapflights users on 10/7. 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 10/216:30 amORD - EZE
2 stops16h 55mMultiple Airlines
Thu 10/231:40 amEZE - ORD
1 stop13h 35mMultiple Airlines
Deal found 10/7$770
This Mytrip deal was found by Cheapflights users on 10/7. 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 11/244:58 pmORD - EZE
3 stops34h 22mMultiple Airlines
Mon 12/87:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 10/7$771
This Mytrip deal was found by Cheapflights users on 10/6. 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 12/610:27 amORD - AEP
2 stops20h 23mMultiple Airlines
Sat 12/134:50 amAEP - ORD
2 stops34h 40mMultiple Airlines
Deal found 10/6$771
This Gotogate deal was found by Cheapflights users on 10/5. 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.
Sat 10/258:40 amORD - EZE
2 stops28h 30mMultiple Airlines
Sun 11/97:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 10/5$772
This Mytrip deal was found by Cheapflights users on 10/6. 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 - AEP
3 stops31h 50mMultiple Airlines
Mon 11/1712:50 pmAEP - ORD
2 stops34h 30mMultiple Airlines
Deal found 10/6$772
This Kiwi.com deal was found by Cheapflights users on 10/6. 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 11/241:35 pmORD - EZE
2 stops32h 25mMultiple Airlines
Sun 12/77:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 10/6$773
This Kiwi.com deal was found by Cheapflights users on 10/7. 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 12/36:00 amORD - EZE
2 stops20h 50mMultiple Airlines
Thu 12/117:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 10/7$774
This Kiwi.com deal was found by Cheapflights users on 10/6. 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.
Sun 10/2611:20 pmORD - EZE
1 stop23h 15mAvianca
Mon 11/107:35 amEZE - ORD
1 stop15h 45mAvianca
Deal found 10/6$775
This Mytrip deal was found by Cheapflights users on 10/7. 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.
Thu 10/237:59 amORD - AEP
2 stops26h 41mMultiple Airlines
Wed 11/57:00 amAEP - ORD
2 stops29h 47mMultiple Airlines
Deal found 10/7$775
This Mytrip deal was found by Cheapflights users on 10/6. 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 11/1110:20 pmORD - EZE
2 stops19h 35mMultiple Airlines
Tue 11/184:55 pmEZE - ORD
3 stops34h 32mMultiple Airlines
Deal found 10/6$776
This Kiwi.com deal was found by Cheapflights users on 10/7. 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.
Thu 12/48:41 amORD - EZE
2 stops27h 14mMultiple Airlines
Thu 12/117:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 10/7$777

Cheap flight deals from Illinois to Buenos Aires

Keep the following information in mind while searching for Illinois to Buenos Aires flight deals. Data was last updated October 8, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$769
(Kiwi.com)

One-way from

$193
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$972
Provider with most accurate pricing for Chicago (CHI)-Buenos Aires (BUE) flight deals.
Provider most trusted by Cheapflights users for Chicago (CHI)-Buenos Aires (BUE) flights.
From Illinois to Buenos Aires (BUE)
One-way flight from Illinois to Buenos Aires (BUE)
Highest demand for flights based on searches. 3% potential increase in price ($42 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($21 potential savings vs. average RT price).
Average for round-trip flights in October 2025

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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 October 8, 2025.
Use the filters below to find and compare flights from Illinois to Buenos Aires that are best for you.

Fly from

Illinois

Fly to

Buenos Aires

Route

Depart

Return

Price

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Thu 11/13

10:20 pm-9:00 pm

2 stops19h 40m

Buenos Aires Jorge Newbery

Sun 11/16

7:00 am-9:47 am

2 stops29h 47m

$822

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Sun 11/16

10:20 pm-9:00 pm

2 stops19h 40m

Buenos Aires Jorge Newbery

Thu 11/20

7:00 am-10:35 am

2 stops30h 35m

$824

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Tue 11/18

9:33 am-4:00 pm

2 stops27h 27m

Buenos Aires Jorge Newbery

Wed 11/26

2:55 pm-6:35 pm

2 stops30h 40m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 10/21

5:15 pm-1:55 pm

2 stops18h 40m

Buenos Aires Ministro Pistarini

Mon 11/10

8:55 pm-10:43 am

1 stop16h 48m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 11/5

8:20 am-7:20 am

1 stop20h 00m

Buenos Aires Ministro Pistarini

Wed 11/12

11:55 pm-10:39 am

1 stop13h 44m

$830

St. LouisBuenos Aires

STL - AEP

STLAEP

Lambert-St Louis

Wed 11/5

6:00 am-7:55 am

2 stops22h 55m

Buenos Aires Jorge Newbery

Mon 11/10

12:40 pm-6:35 pm

2 stops32h 55m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Wed 10/22

1:40 pm-9:45 am

1 stop18h 05m

Buenos Aires Ministro Pistarini

Mon 11/10

4:05 am-9:58 pm

2 stops20h 53m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 10/23

6:52 pm-9:45 am

1 stop12h 53m

Buenos Aires Ministro Pistarini

Mon 11/10

4:05 am-9:58 pm

2 stops20h 53m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Tue 11/18

9:33 am-6:20 am

2 stops17h 47m

Buenos Aires Ministro Pistarini

Tue 11/25

4:05 am-9:58 pm

2 stops20h 53m

$830

St. LouisBuenos Aires

STL - EZE

STLEZE

Lambert-St Louis

Thu 10/23

6:52 pm-9:45 am

1 stop12h 53m

Buenos Aires Ministro Pistarini

Wed 11/12

10:25 pm-4:33 pm

1 stop21h 08m

$830

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Buenos Aires

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

What is the cheapest month to book a flight from Illinois to Buenos Aires?

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

Find hourly flight availability from Illinois 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 October 8, 2025.

It’s optimal to fly from Illinois to Buenos Aires in the evening. By choosing this option you can save up to 31% on the cost of your flight, compared to a flight in the morning.

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

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

Travelers seeking maximum savings on their Illinois 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.

Related info for your journey

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

    There are many flights that can get you from Illinois to Buenos Aires in 15h 04m. Fly via LATAM Airlines, Delta, or Copa Airlines to get the fastest option. Airlines will cover a distance of 5619 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

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

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

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

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

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

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

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Illinois to Buenos Aires

Discover the top 6 airlines that operate flights from Illinois 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 October 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$699Average$1,028FlexibilityNo cancel feeOn-time70%
ArajetCheapest$736Average$884FlexibilityNo cancel feeOn-timeN/A
AviancaCheapest$753Average$1,168FlexibilityNo cancel feeOn-time71%
American AirlinesCheapest$1,015Average$1,245FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,023Average$1,288FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,093Average$1,205FlexibilityNo cancel feeOn-time69%

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