A cityscape with a prominent white church, green parks, and a mix of modern and historic buildings.

$399 Cheap Flights from Chicago (CHI) to Buenos Aires (BUE)

View $399 flight on Sat, Sep 4, 2027

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    • Find the cheapest flights on Expedia from Chicago (CHI) to Buenos Aires (BUE). Flight ticket prices change frequently based on availability and demand. We send price‑drop alerts to make air travel simple and flexible. The lowest one-way fare found on Expedia for this route in the past 7 days starts at $399 for travel on September 4, 2027.

    Cheap Flights from Chicago to Buenos Aires (CHI-BUE)

    Prices were available within the past 7 days and start at $399 for one-way flights and $829 for roundtrip, for the period specified. Prices and availability are subject to change.

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    One way

    Roundtrip

    Select Sterling Blue flight, departing Mon, Mar 15 from Chicago to Buenos Aires, returning Thu, Apr 1, priced at $829 Found 2 days ago

    Mon, Mar 15 - Thu, Apr 1 · ORD · EZE · Roundtrip

    Select Sterling Blue flight, departing Mon, Apr 12 from Chicago to Buenos Aires, returning Sun, Apr 25, priced at $842 Found 3 days ago

    Mon, Apr 12 - Sun, Apr 25 · ORD · EZE · Roundtrip

    Select Sterling Blue flight, departing Sat, Jun 26 from Chicago to Buenos Aires, returning Sun, Jul 4, priced at $846 Found 5 days ago

    Sat, Jun 26 - Sun, Jul 4 · ORD · EZE · Roundtrip

    Select Sterling Blue flight, departing Sat, Jul 17 from Chicago to Buenos Aires, returning Sun, Aug 1, priced at $861 Found 5 hours ago

    Sat, Jul 17 - Sun, Aug 1 · ORD · EZE · Roundtrip

    Select Sterling Blue flight, departing Sat, Jun 5 from Chicago to Buenos Aires, returning Sun, Jun 20, priced at $881 Found 1 day ago

    Sat, Jun 5 - Sun, Jun 20 · ORD · EZE · Roundtrip

    Select Sterling Blue flight, departing Sat, Jun 26 from Chicago to Buenos Aires, returning Sun, Jul 4, priced at $883 Found 5 days ago

    Sat, Jun 26 - Sun, Jul 4 · ORD · EZE · Roundtrip

    Select Copa flight, departing Tue, Mar 9 from Chicago to Buenos Aires, returning Tue, Mar 23, priced at $914 Found 7 hours ago

    Tue, Mar 9 - Tue, Mar 23 · ORD · EZE · Roundtrip

    Select Delta flight, departing Wed, Nov 25 from Chicago to Buenos Aires, returning Wed, Dec 2, priced at $926 Just found

    Wed, Nov 25 - Wed, Dec 2 · MDW · EZE · Roundtrip

    Select United flight, departing Wed, Nov 25 from Chicago to Buenos Aires, returning Wed, Dec 2, priced at $926 Just found

    Wed, Nov 25 - Wed, Dec 2 · ORD · EZE · Roundtrip

    Select American Airlines flight, departing Tue, Feb 2 from Chicago to Buenos Aires, returning Tue, Feb 23, priced at $926 Found 6 hours ago

    Tue, Feb 2 - Tue, Feb 23 · ORD · EZE · Roundtrip

    Alternative airports near Buenos Aires

    Prices were available within the past 7 days. Prices and availability are subject to change.

    Select flight to Ministro Pistarini Intl. EZE. Cheapest option available. Average driving time to city center is 25 minutes. Flights from $926

    25 min

    Select flight to Aeroparque Jorge Newbery AEP. Closest option available. Average driving time to city center is 11 minutes. Flights from $957

    11 min

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    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 March. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $399 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.

    Travel information

    Origin airportChicago Midway Airport
    Destination airportBuenos Aires
    Distance5,592 miles away
    Airlines servingLATAM Airlines Group, Delta
    Popular airlineLATAM Airlines Group
    Roundtrip price$829

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