$389 Cheap Flights from Chicago (ORD) to Buenos Aires (AEP)

View $389 flight on Fri, Jun 6, 2025Opens in a new window
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Cheap Flights from Chicago to Buenos Aires (ORD-AEP)

Prices were available within the past 7 days and start at $389 for one-way flights and $905 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Aug 6 - Wed, Sep 24
ORD
Chicago
AEP
Buenos Aires
$905 Roundtrip, found 4 days ago
$905
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Aug 6 from Chicago to Buenos Aires, returning Wed, Sep 24, priced at $905 found 4 days ago
American Airlines
Wed, Aug 6 - Wed, Sep 24
ORD
Chicago
AEP
Buenos Aires
$925 Roundtrip, found 4 days ago
$925
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Aug 6 from Chicago to Buenos Aires, returning Wed, Sep 24, priced at $925 found 4 days ago
American Airlines
Wed, May 21 - Wed, Jun 11
ORD
Chicago
AEP
Buenos Aires
$961 Roundtrip, found 5 days ago
$961
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, May 21 from Chicago to Buenos Aires, returning Wed, Jun 11, priced at $961 found 5 days ago
American Airlines
Wed, Aug 6 - Wed, Sep 24
ORD
Chicago
AEP
Buenos Aires
$965 Roundtrip, found 4 days ago
$965
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Aug 6 from Chicago to Buenos Aires, returning Wed, Sep 24, priced at $965 found 4 days ago
American Airlines
Wed, May 21 - Wed, Jun 11
ORD
Chicago
AEP
Buenos Aires
$981 Roundtrip, found 5 days ago
$981
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, May 21 from Chicago to Buenos Aires, returning Wed, Jun 11, priced at $981 found 5 days ago
United
Fri, Sep 5 - Mon, Sep 8
ORD
Chicago
AEP
Buenos Aires
$996 Roundtrip, found 5 hours ago
$996
Roundtrip
found 5 hours ago
Select United flight, departing Fri, Sep 5 from Chicago to Buenos Aires, returning Mon, Sep 8, priced at $996 found 5 hours ago
United
Sun, Sep 21 - Mon, Oct 6
ORD
Chicago
AEP
Buenos Aires
$1,016 Roundtrip, found 7 hours ago
$1,016
Roundtrip
found 7 hours ago
Select United flight, departing Sun, Sep 21 from Chicago to Buenos Aires, returning Mon, Oct 6, priced at $1,016 found 7 hours ago
Delta
Tue, Oct 7 - Tue, Oct 14
ORD
Chicago
AEP
Buenos Aires
$1,064 Roundtrip, found 2 days ago
$1,064
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Oct 7 from Chicago to Buenos Aires, returning Tue, Oct 14, priced at $1,064 found 2 days ago
Air Canada
Thu, Oct 2 - Sun, Oct 5
ORD
Chicago
AEP
Buenos Aires
$1,065 Roundtrip, found 22 hours ago
$1,065
Roundtrip
found 22 hours ago
Select Air Canada flight, departing Thu, Oct 2 from Chicago to Buenos Aires, returning Sun, Oct 5, priced at $1,065 found 22 hours ago
avianca
Tue, Jun 3 - Sun, Jun 8
ORD
Chicago
AEP
Buenos Aires
$1,069 Roundtrip, found 12 hours ago
$1,069
Roundtrip
found 12 hours ago
Select avianca flight, departing Tue, Jun 3 from Chicago to Buenos Aires, returning Sun, Jun 8, priced at $1,069 found 12 hours ago
Flights from Chicago (ORD) to Buenos Aires (AEP)
Origin airport
O'Hare Intl.
Destination airport
Aeroparque Jorge Newbery
Airlines serving
Air Canada, Delta, GOL Linhas Aereas S.A., LATAM Airlines Group, avianca
Roundtrip price
$905
Distance
5607 mi

Chicago to Buenos Aires Flights

The cheapest times to fly from Chicago to Buenos Aires

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Chicago to Buenos Aires are during the month of August. You can find some of the cheapest flights from Chicago to Buenos Aires with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Chicago to Buenos Aires

Sunday is one of the best days to book for cheap flights from Chicago to Buenos Aires: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Chicago to Buenos Aires

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Chicago to Buenos Aires in 2025. You can also book with separate airlines for your outbound and return journeys, from $389 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Chicago to Buenos Aires flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Chicago to Buenos Aires airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from O'Hare Intl. Airport (ORD) to Aeroparque Jorge Newbery Airport (AEP) cost?
Discover the latest flight deals from ORD to AEP by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ORD to AEP?
The cheapest flights from ORD to AEP are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from ORD to AEP?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from ORD to AEP. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from O'Hare Intl. Airport (ORD) to Aeroparque Jorge Newbery Airport (AEP)?
There aren’t any daily direct flights available from O’Hare Intl. Airport (ORD) to Aeroparque Jorge Newbery Airport (AEP). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you’ll be on your way in no time at all.
What day of the week has the most flights from ORD to AEP?
Generally you’ll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can change based on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from O'Hare Intl. Airport (ORD) to Aeroparque Jorge Newbery Airport (AEP)?
Choose a flight from O’Hare Intl. Airport (ORD) to Aeroparque Jorge Newbery Airport (AEP) that leaves before 3 PM to reduce the likelihood of delays. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from O'Hare Intl. Airport (ORD) to Aeroparque Jorge Newbery Airport (AEP) last-minute?
Holding off until just before your departure to book a flight from ORD to AEP often results in higher prices. While it’s possible to find some last-minute discounts, they’re not always guaranteed. Keep your travel plans flexible to maximize your chances of getting a bargain.
Is it cheaper to book an ORD to AEP flight and hotel package?
Compared with arranging hotels and flights separately, booking an ORD to AEP flight and hotel package with Expedia could result in significant savings. Better still, managing everything in one place takes the hassle out of planning your trip. Just secure your flights and choose from our wide range of hotels, then personalize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Aeroparque Jorge Newbery Airport (AEP)?
Generally, it’s possible to cancel or reschedule your ORD to AEP flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and if any costs are involved. You’ll also find more details on our Customer Service portal.

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*Available to One Key members.