Cheap flights from Chicago to Buenos Aires from $312
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Buenos Aires departing on 11/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Chicago to Buenos Aires
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Chicago and Buenos Aires?
What is the cheapest month to fly to Buenos Aires?
The cheapest month to fly to Buenos Aires from Chicago is in September. Flight prices, which tend to average around $1,023, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Buenos Aires from Chicago during July instead. Flights to Buenos Aires in July, while not as cheap as those in September, still average around $1,072.
What is the cheapest day to depart on your flight to Buenos Aires?
On average, the least expensive day to fly to Buenos Aires from Chicago is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,133. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to Buenos Aires on Thursday is $1,268.
What is the cheapest time of day to depart on your flight to Buenos Aires?
Our most recent data shows that the best time of day to fly to Buenos Aires is in the evening. Flights from Chicago to Buenos Aires during this time can be as low as $1,103. Try not to purchase tickets at noon because they tend to be around $1,268. Of course, these prices can vary depending on the time of year and what airport you fly to.
How far in advance should I book a flight to Buenos Aires?
You are more likely to see cheaper flights to Buenos Aires from Chicago when booking 24 weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,204 when searching 24 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from Chicago for as low as $820 on momondo.
Can stopping save me money on Chicago to Buenos Aires flights?
You could potentially save up to 26% on your flight if you consider stops on a Chicago to Buenos Aires flight.
How have Chicago to Buenos Aires flight prices changed over time?
As of June 2025, prices for Chicago to Buenos Aires flights are approximately 21% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Chicago to Buenos Aires?
Arajet, Avianca, and Air Canada are the most popular carriers operating from Chicago to Buenos Aires
What airlines fly to Buenos Aires?
United Airlines, American Airlines and Avianca are the top three most popular airlines that fly to Buenos Aires from Chicago according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Buenos Aires. Keep in mind that there are 5 different airlines that fly to Buenos Aires on a routine basis, so you have a few additional options to choose from.
When to book flights from Chicago to Buenos Aires
Cheap Chicago to Buenos Aires (CHI to BUE) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Chicago to Buenos Aires
How far is Chicago to Buenos Aires by plane?
A flight from Chicago to Buenos Aires will travel around 5596.4 mi. 12h 35m is a normal flight duration for this route.
When did momondo last update prices for flights from Chicago to Buenos Aires?
Prices for flights from Chicago to Buenos Aires are updated daily.
How many operators does momondo search for flights from Chicago to Buenos Aires?
The number of operators available for flights from Chicago to Buenos Aires is 5 as of June 2025.
How old do you have to be to fly from Chicago to Buenos Aires?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Buenos Aires.
What documentation or ID do you need to fly to Buenos Aires?
The travel and health documents you'll need for your trip to Buenos Aires may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Buenos Aires. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Chicago to Buenos Aires?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Chicago to Buenos Aires is Avianca (23% of total bookings). The next most popular airlines are Delta (22%), United Airlines (19%), and American Airlines (19%).
Best airlines flying from Chicago to Buenos Aires
Compare and see reviews for airlines that fly from Chicago to Buenos Aires with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $722 | Free Cancellation | Rating 7.5 1,451 reviews | |||
| PriceFrom $750 | Free Cancellation | Rating 6.7 2,345 reviews | |||
| PriceFrom $1,023 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $1,023 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $1,093 | Free Cancellation | Rating 7.4 8,790 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Chicago to Buenos Aires?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Buenos Aires from Chicago.
Can I find flights from Chicago to Buenos Aires with flexible booking policies on momondo?
Yes. All flights to Buenos Aires from Chicago on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Chicago to Buenos Aires?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Chicago to Buenos Aires.
I’m not ready to book a flight from Chicago to Buenos Aires right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Chicago to Buenos Aires flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.