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$319+ 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 10/30. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUE
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 September 11, 2025.

Round-trip from

$896
(Copa Airlines)

One-way from

$319
(flugladen.de)

Popular in

December

Cheapest in

July

Average price

$1,040
From Illinois to Buenos Aires (BUE)
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One-way flight from Illinois to Buenos Aires (BUE)
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Highest demand for flights based on searches. 8% potential increase in price ($114 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 11, 2025.

This Copa Airlines deal was found by Cheapflights users on 9/11. 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.
Mon 12/86:55 amORD - EZE
1 stop18h 21mCopa Airlines
Thu 12/255:16 amEZE - ORD
1 stop21h 49mCopa Airlines
Deal found 9/11$896
This Mytrip deal was found by Cheapflights users on 9/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:59 pmORD - EZE
2 stops30h 46mMultiple Airlines
Sun 12/218:40 amEZE - ORD
1 stop15h 30mMultiple Airlines
Deal found 9/9$897
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Thu 11/65:05 amORD - AEP
3 stops33h 15mMultiple Airlines
Sat 11/1512:05 amAEP - ORD
2 stops23h 15mMultiple Airlines
Deal found 9/10$897
This Mytrip deal was found by Cheapflights users on 9/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/67:56 pmORD - EZE
2 stops25h 39mMultiple Airlines
Sun 11/166:35 pmEZE - ORD
3 stops32h 07mMultiple Airlines
Deal found 9/9$898
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Sat 10/255:05 amORD - AEP
3 stops24h 50mMultiple Airlines
Sun 11/92:30 pmAEP - ORD
3 stops24h 45mMultiple Airlines
Deal found 9/10$898
This Mytrip deal was found by Cheapflights users on 9/10. 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 10/107:43 pmORD - EZE
3 stops47h 47mMultiple Airlines
Thu 10/161:40 amEZE - ORD
2 stops18h 58mMultiple Airlines
Deal found 9/10$899
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/152:35 pmORD - EZE
2 stops29h 50mMultiple Airlines
Sun 11/97:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 9/11$900
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Wed 11/56:05 amORD - AEP
3 stops22h 50mMultiple Airlines
Tue 11/1112:05 amAEP - ORD
3 stops24h 18mMultiple Airlines
Deal found 9/10$900
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Sun 12/73:30 amORD - EZE
1 stop13h 45mMultiple Airlines
Thu 12/114:45 amEZE - ORD
3 stops31h 38mMultiple Airlines
Deal found 9/10$901
This Expedia deal was found by Cheapflights users on 9/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/143:35 pmORD - EZE
2 stops20h 55mMultiple Airlines
Tue 9/306:50 amEZE - ORD
1 stop32h 25mMultiple Airlines
Deal found 9/9$902
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Mon 11/103:11 pmORD - EZE
3 stops35h 39mMultiple Airlines
Mon 11/173:30 amEZE - ORD
2 stops20h 53mMultiple Airlines
Deal found 9/10$903
This Booking.com deal was found by Cheapflights users on 9/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:35 amORD - EZE
1 stop16h 30mMultiple Airlines
Tue 12/307:35 amEZE - ORD
1 stop15h 45mMultiple Airlines
Deal found 9/9$904

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 September 11, 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 - EZE

ORDEZE

Chicago O'Hare Intl

Mon 12/8

6:55 am-4:16 am

1 stop18h 21m

Buenos Aires Ministro Pistarini

Thu 12/25

5:16 am-12:05 am

1 stop21h 49m

$896

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Sun 12/7

6:55 am-4:10 am

1 stop18h 15m

Buenos Aires Ministro Pistarini

Sun 12/21

3:41 am-12:05 am

1 stop23h 24m

$896

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Thu 11/6

5:05 am-5:20 pm

3 stops33h 15m

Buenos Aires Jorge Newbery

Sat 11/15

12:05 am-8:20 pm

2 stops23h 15m

$897

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Sat 10/25

5:05 am-7:55 am

3 stops24h 50m

Buenos Aires Jorge Newbery

Sun 11/9

2:30 pm-12:15 pm

3 stops24h 45m

$898

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

Wed 11/5

6:05 am-7:55 am

3 stops22h 50m

Buenos Aires Jorge Newbery

Tue 11/11

12:05 am-8:20 pm

2 stops23h 15m

$901

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Thu 10/2

7:59 am-12:34 am

1 stop14h 35m

Buenos Aires Ministro Pistarini

Wed 10/15

10:07 am-12:21 am

1 stop16h 14m

$921

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 11/28

10:20 pm-3:50 pm

1 stop14h 30m

Buenos Aires Ministro Pistarini

Sat 12/6

6:15 am-8:20 pm

2 stops41h 05m

$935

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 11/28

6:56 am-4:10 am

1 stop18h 14m

Buenos Aires Ministro Pistarini

Fri 12/5

3:41 am-12:05 am

1 stop23h 24m

$936

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Wed 11/19

6:56 am-4:16 am

1 stop18h 20m

Buenos Aires Ministro Pistarini

Fri 11/28

3:57 am-12:05 am

1 stop23h 08m

$936

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

Fri 11/21

6:56 am-4:16 am

1 stop18h 20m

Buenos Aires Ministro Pistarini

Sat 11/29

3:57 am-12:05 am

1 stop23h 08m

$936

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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, April is the cheapest month in which you can book a flight from Illinois to Buenos Aires (average of $795). Flying from Illinois 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 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 September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Buenos Aires as you normally would.

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 14h 30m. Fly via Copa Airlines, Avianca, or Delta 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?

    When deciding which route to take from Illinois to Buenos Aires consider Chicago O'Hare Intl - Buenos Aires Ministro Pistarini, Chicago O'Hare Intl - Buenos Aires Jorge Newbery or Chicago Midway - Buenos Aires Ministro Pistarini as they are the most popular.

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

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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.
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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$699Average$1,059FlexibilityNo cancel feeOn-time70%
ArajetCheapest$736Average$884FlexibilityNo cancel feeOn-timeN/A
AviancaCheapest$753Average$1,168FlexibilityNo cancel feeOn-time71%
American AirlinesCheapest$1,015Average$1,242FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,023Average$1,288FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,094Average$1,221FlexibilityNo cancel feeOn-time69%

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