Cheap flights from Ontario to Buenos Aires from $395
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Buenos Aires departing on 7/1. 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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United Airlines flights from Ontario to Buenos Aires
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How to get the cheapest flight ticket from Ontario 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 day to depart on your flight to Buenos Aires?
On average, the least expensive day to fly to Buenos Aires from Ontario is on a Monday. momondo users have found tickets for Monday departures for as low as $855. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Buenos Aires on Saturday is $1,005.
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 afternoon. Flights from Ontario to Buenos Aires during this time can be as low as $918. Try not to purchase tickets in the morning because they tend to be around $963. Of course, these prices can vary depending on the time of year and what airport you fly to.
What is the cheapest airline that flies from Ontario to Buenos Aires?
Avianca, Delta, and United Airlines are the most popular carriers operating from Ontario to Buenos Aires
What airlines fly to Buenos Aires?
LATAM Airlines, United Airlines and American Airlines are the top three most popular airlines that fly to Buenos Aires from Ontario according to our data. LATAM Airlines is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Buenos Aires. Keep in mind that there are 7 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 Ontario to Buenos Aires
Cheap Ontario to Buenos Aires (ONT to BUE) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Buenos Aires
How far is Ontario to Buenos Aires by plane?
The straight-line distance from Ontario to Buenos Aires is 6094.6 mi. By plane, this route typically takes 16h 42m.
When did momondo last update prices for flights from Ontario Airport to Buenos Aires?
Prices for flights from Ontario Airport to Buenos Aires are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario Airport to Buenos Aires?
As of June 2025, there is 1 operator available to choose from for flights from Ontario Airport to Buenos Aires.
How old do you have to be to fly from Ontario Airport 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 Ontario 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 Ontario to Buenos Aires?
momondo data reveals that the most frequently booked airline on the route from Ontario to Buenos Aires is United Airlines, representing 100% of all bookings.
Best airlines flying from Ontario to Buenos Aires
Compare and see reviews for airlines that fly from Ontario to Buenos Aires with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $1,133 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to Buenos Aires?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Buenos Aires. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Ontario to Buenos Aires with flexible booking policies on momondo?
All flight searches from Ontario to Buenos Aires on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Ontario to Buenos Aires?
Once all potential Ontario 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 Ontario to Buenos Aires right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Buenos Aires, momondo offers a useful price alert feature which will track prices for flights to Buenos Aires from Ontario and alert you when they change.