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Buenos Aires

$268+ 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BUE
ene. 2 — ene. 91
vie. 1/2
vie. 1/9
1 adult, Economy
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Cheap 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 diciembre 3, 2025.

This Mytrip deal was found by Cheapflights users on 11/30. 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.
lun. 12/15:45 amORD - EZE
1 stop15h 20mMultiple Airlines
mié. 12/103:41 amEZE - ORD
2 stops17h 55mMultiple Airlines
Deal found 11/30$770
This Kiwi.com deal was found by Cheapflights users on 11/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/107:10 amORD - EZE
2 stops21h 49mMultiple Airlines
vie. 1/239:15 pmEZE - ORD
1 stop14h 42mMultiple Airlines
Deal found 11/30$771
This Kiwi.com deal was found by Cheapflights users on 11/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/72:59 pmMDW - EZE
1 stop15h 36mMultiple Airlines
mié. 1/2812:54 pmEZE - MDW
2 stops23h 59mMultiple Airlines
Deal found 11/30$778
This Kiwi.com deal was found by Cheapflights users on 11/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/127:25 amORD - EZE
2 stops20h 55mMultiple Airlines
vie. 1/239:15 pmEZE - ORD
1 stop14h 42mMultiple Airlines
Deal found 11/30$782
This KAYAK deal was found by Cheapflights users on 12/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/69:49 amORD - EZE
2 stops20h 46mLATAM Airlines
dom. 12/72:45 pmEZE - ORD
2 stops22h 29mLATAM Airlines
Deal found 12/2$799
This Kiwi.com deal was found by Cheapflights users on 11/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/85:45 amORD - EZE
1 stop15h 20mArajet
vie. 1/239:15 pmEZE - ORD
1 stop14h 42mArajet
Deal found 11/30$809
This Arajet deal was found by Cheapflights users on 12/2. 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 Arajet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/315:45 amORD - EZE
1 stop15h 20mArajet
dom. 1/188:40 amEZE - ORD
1 stop15h 30mArajet
Deal found 12/2$814
This LATAM Airlines deal was found by Cheapflights users on 12/1. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/86:00 amMDW - EZE
2 stops24h 35mLATAM Airlines
jue. 12/1112:15 pmEZE - MDW
2 stops24h 39mLATAM Airlines
Deal found 12/1$825
This LATAM Airlines deal was found by Cheapflights users on 12/1. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/81:01 pmORD - EZE
2 stops17h 34mLATAM Airlines
jue. 12/117:43 pmEZE - ORD
2 stops17h 31mLATAM Airlines
Deal found 12/1$825
This Kiwi.com deal was found by Cheapflights users on 12/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/57:33 amORD - EZE
2 stops26h 57mMultiple Airlines
mié. 12/1011:00 amEZE - ORD
1 stop34h 36mMultiple Airlines
Deal found 12/1$830
This Mytrip deal was found by Cheapflights users on 11/30. 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.
lun. 12/17:33 amORD - AEP
2 stops20h 47mMultiple Airlines
jue. 12/115:45 amAEP - ORD
2 stops21h 20mMultiple Airlines
Deal found 11/30$831
This Kiwi.com deal was found by Cheapflights users on 11/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/87:41 pmORD - EZE
2 stops26h 17mMultiple Airlines
lun. 1/2611:00 amEZE - ORD
1 stop24h 18mMultiple Airlines
Deal found 11/30$833

Find 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 diciembre 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$764
(Kiwi.com)

One-way from

$268
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$1,221
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 Illinois to Buenos Aires (BUE)
Search Deals
One-way flight from Illinois to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 diciembre 3, 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

mar. 1/20

7:20 am-9:20 pm

3 stops35h 00m

Buenos Aires Jorge Newbery

sáb. 1/31

8:50 am-11:22 am

3 stops29h 32m

$806

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

mié. 12/31

5:45 am-12:05 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

dom. 1/18

8:40 am-9:10 pm

1 stop15h 30m

$814

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

mié. 5/20

5:35 am-12:05 am

1 stop16h 30m

Buenos Aires Ministro Pistarini

vie. 7/3

9:15 pm-9:57 am

1 stop14h 42m

$818

ChicagoBuenos Aires

MDW - EZE

MDWEZE

Chicago Midway

lun. 12/8

6:00 am-9:35 am

2 stops24h 35m

Buenos Aires Ministro Pistarini

jue. 12/11

12:15 pm-9:54 am

2 stops24h 39m

$825

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

mié. 2/4

5:45 am-12:05 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

mar. 2/10

11:15 am-10:40 pm

1 stop14h 25m

$831

ChicagoBuenos Aires

ORD - EZE

ORDEZE

Chicago O'Hare Intl

mié. 1/28

5:45 am-12:05 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

vie. 2/6

9:15 pm-8:57 am

1 stop14h 42m

$831

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

dom. 3/15

11:20 pm-9:20 pm

2 stops20h 00m

Buenos Aires Jorge Newbery

mar. 3/24

9:50 am-6:14 pm

3 stops34h 24m

$834

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

mié. 1/14

5:45 am-9:40 am

2 stops24h 55m

Buenos Aires Jorge Newbery

mié. 1/28

10:30 am-6:16 pm

3 stops34h 46m

$841

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

mié. 5/13

2:35 pm-5:00 am

2 stops36h 25m

Buenos Aires Jorge Newbery

mié. 5/20

11:20 pm-1:15 pm

2 stops39h 55m

$852

ChicagoBuenos Aires

ORD - AEP

ORDAEP

Chicago O'Hare Intl

lun. 2/9

6:57 pm-3:40 am

3 stops29h 43m

Buenos Aires Jorge Newbery

lun. 2/23

5:10 pm-11:27 am

2 stops21h 17m

$853

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

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 $378). 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 diciembre 3, 2025.

It’s optimal to fly from Illinois to Buenos Aires in the evening. By choosing this option you can save up to 30% 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 20m. Fly via Arajet, LATAM Airlines, 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 cheapest airlines to fly from Illinois to Buenos Aires one-way?

    To fly one-way, consider booking your trip with Avianca, which is currently one of the cheapest options available, starting at $331. American Airlines flights start at $752 while deals on United Airlines start at $762 one-way.

  • 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, October is the cheapest month in which you can book a flight from Illinois to Buenos Aires (average of $378). 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

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 diciembre 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
ArajetCheapest$360Average$894FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$699Average$976FlexibilityNo cancel feeOn-time70%
AviancaCheapest$750Average$1,131FlexibilityNo cancel feeOn-time71%
DeltaCheapest$951Average$1,194FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$951Average$1,166FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,015Average$1,252FlexibilityNo cancel feeOn-time71%

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