Cheap flights from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport 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 O'Hare Intl Airport 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 cheapest month to fly to Buenos Aires?
The cheapest month to fly to Buenos Aires from Chicago O'Hare Intl Airport is in March. Flight prices, which tend to average around $1,094, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of March, then book flights to Buenos Aires from Chicago O'Hare Intl Airport during July instead. Flights to Buenos Aires in July, while not as cheap as those in March, still average around $1,107.
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 O'Hare Intl Airport 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 O'Hare Intl Airport 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 O'Hare Intl Airport 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 O'Hare Intl Airport for as low as $820 on momondo.
What is the cheapest airline that flies from Chicago O'Hare Intl to Buenos Aires?
Arajet, Avianca, and Air Canada are the most popular carriers operating from Chicago O'Hare Intl 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 O'Hare Intl Airport 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 O'Hare Intl Airport to Buenos Aires
Cheap Chicago O'Hare Intl Airport to Buenos Aires (ORD to BUE) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Buenos Aires
How far is Chicago O'Hare Intl to Buenos Aires by plane?
Buenos Aires is 5608.8 mi away from Chicago O'Hare Intl. Typically, this will take 13h 10m by plane in normal conditions.
When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Buenos Aires?
Prices for flights from Chicago O'Hare Intl Airport to Buenos Aires are updated daily.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Buenos Aires?
As of June 2025, there are 5 operators available to choose from for flights from Chicago O'Hare Intl Airport to Buenos Aires.
How old do you have to be to fly from Chicago O'Hare Intl Airport to Buenos Aires?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago O'Hare Intl Airport to Buenos Aires.
What documentation or ID do you need to fly to Buenos Aires?
The required travel and health documents for your Buenos Aires trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Buenos Aires. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Chicago O'Hare Intl Airport to Buenos Aires?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Chicago O'Hare Intl Airport to Buenos Aires is American Airlines (31% of total bookings). The next most popular airlines are United Airlines (24%), Delta (18%), and Avianca (17%).
Best airlines flying from Chicago O'Hare Intl Airport to Buenos Aires
Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport 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?
It is quick and easy to find Chicago to Buenos Aires flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Buenos Aires that suits you.
Can I find flights from Chicago to Buenos Aires with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Chicago to Buenos Aires flights to just show those with flexible booking policies.
How can momondo help me find flights from Chicago to Buenos Aires?
Once all potential Chicago to Buenos Aires flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Chicago to Buenos Aires right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Chicago to Buenos Aires flights. All you need is a valid email address and we will do the rest; it is that quick and easy.