Cheap Flights from Chicago to Buenos Aires from $259

Frequently Asked Questions

• What are the cheapest flights from Chicago to Buenos Aires (CHI-BUE)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as $259 on Cheapest nonstop routes (e.g. MDW to EZE on Wed, Dec 31), while United Airlines offers Cheapest nonstop round-trips from $899 departing on Thu, Dec 11 and returning on Mon, Dec 15.

• Which airlines offer flights from Chicago to Buenos Aires?

  At the moment, several airlines serve connecting flights from Chicago to Buenos Aires, including: avianca Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.

• When is the best time to book flights from Chicago to Buenos Aires?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chicago to Buenos Aires is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Chicago to Buenos Aires?

  To find best deals on flights from Chicago to Buenos Aires, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Dec 31, with one-way flights priced at just $259.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Buenos Aires travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Chicago (CHI) to Buenos Aires (BUE) the cheapest?

  The cheapest months to fly from Chicago to Buenos Aires is December, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Chicago to Buenos Aires on?

  After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Chicago to Buenos Aires on December 31, 2025 with Frontier Airlines, with prices starting at $258.

• Which airports can I fly to for Buenos Aires from Chicago?

  You can land at any one of the following hubs in Buenos Aires, with O'Hare International Airport to Ministro Pistarini International Airport (ORD-EZE) is by far the most common option on this route: Ministro Pistarini International Airport (EZE) Jorge Newbery Airport (AEP).

• Is there any time difference between Chicago and Buenos Aires?

  The time difference between Buenos Aires and Chicago is 3h.

• How do I change or cancel my ticket from Chicago to Buenos Aires?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.