Cheap flights from Illinois to Buenos Aires from $319
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Buenos Aires departing on 9/11. 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 Illinois 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 Illinois 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 Illinois 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 Illinois 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 Illinois 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 Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,204 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from Illinois for as low as $820 on momondo.
What is the cheapest airline that flies from Illinois to Buenos Aires?
Avianca, Air Canada, and LATAM Airlines are the most popular carriers operating from Illinois 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 Illinois 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.
Cheap Illinois to Buenos Aires flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to Buenos Aires
When did momondo last update prices for flights from Illinois to Buenos Aires?
Prices for flights from Illinois to Buenos Aires are refreshed on a daily basis.
How many operators does momondo search for flights from Illinois to Buenos Aires?
As of June 2025, there are 5 operators available to choose from for flights from Illinois to Buenos Aires.
How old do you have to be to fly from Illinois 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 Illinois 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.
Best airlines flying from Illinois to Buenos Aires
Compare and see reviews for airlines that fly from Illinois to Buenos Aires with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $722 | Free Cancellation | Rating 7.5 1,460 reviews | |||
| PriceFrom $750 | Free Cancellation | Rating 6.7 2,355 reviews | |||
| PriceFrom $1,023 | Free Cancellation | Rating 8.0 7,965 reviews | |||
| PriceFrom $1,023 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $1,093 | Free Cancellation | Rating 7.4 8,840 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Illinois to Buenos Aires?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Buenos Aires. momondo saves you time and could save you money on your trip.
Can I find flights from Illinois to Buenos Aires with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Illinois to Buenos Aires flights to just show those with flexible booking policies.
How can momondo help me find flights from Illinois 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 Illinois to Buenos Aires.
I’m not ready to book a flight from Illinois to Buenos Aires right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Illinois to Buenos Aires flights. All you need is a valid email address and we will do the rest; it is that quick and easy.