What are the cheapest airlines flying from Ontario to Buenos Aires round-trip?

According to our current data, United Airlines ($1,030), Avianca ($1,282), and Delta ($1,460) offers the cheapest pricing from Ontario to Buenos Aires.

What are the cheapest airlines to fly from Ontario to Buenos Aires one-way?

To fly one-way, consider booking your trip with Avianca, which is currently one of the cheapest options available, starting at $424. United Airlines flights start at $638 while deals on Delta start at $869 one-way.

What is the cheapest day to fly from Ontario to Buenos Aires?

Travelers seeking maximum savings on their Ontario to Buenos Aires flight should consider departing on Monday evenings when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from Ontario to Buenos Aires?

Wednesday flights are found to be more expensive to fly from Ontario to Buenos Aires. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Buenos Aires.

How far in advance should I book a flight from Ontario to Buenos Aires?

Find a great deal and save up to 23% by booking at least 12 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ontario to Buenos Aires within the next two weeks, with the cheapest ticket starting at $730.

What is the cheapest month to fly from Ontario to Buenos Aires?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, May can be a great choice for travel to Buenos Aires. Flights to Buenos Aires from Ontario in May are about $952 on average during May, but can be found for as low as $650.

Most accurate provider : When it comes to deals on Ontario-Buenos Aires flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Ontario-Buenos Aires flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Ontario-Buenos Aires flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-Buenos Aires flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Buenos Aires flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from Ontario to Buenos Aires?

Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Buenos Aires. You should not have trouble finding flights to Buenos Aires from Ontario; the airport handles an average of 0 outbound flights to Buenos Aires per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Ontario airport to Buenos Aires. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

Can I find deals for flights from Ontario to Buenos Aires that include hotel bookings?

Yes. In addition to deals on Ontario to Buenos Aires flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to Buenos Aires?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Buenos Aires.

Can I find deals for business class flights from Ontario to Buenos Aires?

Yes. Cheapflights offers flight deals from Ontario to Buenos Aires by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$424+ Flights from Ontario to Buenos Aires

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Ontario to Buenos Aires with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Buenos Aires

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$1,030 (United Airlines)
One-way from	$424 (Mytrip)

Provider with most accurate pricing for Ontario-Buenos Aires (BUE) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ontario-Buenos Aires (BUE) flights.

Search Deals

From Ontario to Buenos Aires (BUE)

Search Deals

One-way flight from Ontario to Buenos Aires (BUE)

Search Deals

Find flight deals from Ontario to Buenos Aires

Cheapest flights from Ontario to Buenos Aires
Explore the most affordable flight options available from Ontario to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 17, 2025.

Sat 11/810:30 pmONT - EZE

2 stops20h 45mAvianca

Fri 11/141:45 amEZE - ONT

2 stops24h 15mAvianca

Deal found 1/16

$882

Tue 4/16:05 amONT - EZE

1 stop21h 55mUnited Airlines

Wed 4/99:00 pmEZE - ONT

2 stops27h 42mUnited Airlines

Deal found 1/16

$1,030

Fri 2/285:10 pmONT - EZE

2 stops58h 50mDelta

Tue 3/188:55 pmEZE - ONT

2 stops30h 50mDelta

Deal found 1/16

$1,460

Sat 8/210:31 amONT - EZE

2 stops17h 04mAmerican Airlines

Sat 8/1610:00 pmEZE - ONT

2 stops17h 27mAmerican Airlines

Deal found 1/16

$1,605

Best flights from Ontario to Buenos Aires
Discover carefully curated flight deals from Ontario to Buenos Aires that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 17, 2025.

Tue 4/16:05 amONT - EZE

1 stop21h 55mUnited Airlines

Wed 4/99:00 pmEZE - ONT

2 stops27h 42mUnited Airlines

Deal found 1/16

$1,030

Thu 3/610:30 pmONT - EZE

3 stops25h 10mAvianca

Mon 3/312:30 amEZE - ONT

3 stops23h 25mAvianca

Deal found 1/16

$1,282

Fri 2/285:10 pmONT - EZE

2 stops58h 50mDelta

Tue 3/188:55 pmEZE - ONT

2 stops30h 50mDelta

Deal found 1/16

$1,460

Mon 2/2410:51 amONT - EZE

1 stop18h 38mAmerican Airlines

Tue 3/189:30 pmEZE - ONT

1 stop16h 31mAmerican Airlines

Deal found 1/16

$1,800

Last-minute flights from Ontario to Buenos Aires
Discover last-minute flight deals from Ontario to Buenos Aires. Data last updated January 17, 2025 and is based on user searches.

Tue 1/2110:30 pmONT - EZE

3 stops21h 55mAvianca

Tue 1/285:50 amEZE - ONT

3 stops20h 10mAvianca

Deal found 1/16

$1,706

Wed 1/2210:47 amONT - EZE

2 stops17h 33mUnited Airlines

Wed 2/1910:05 pmEZE - ONT

2 stops21h 24mUnited Airlines

Deal found 1/16

$1,449

Thu 1/2312:51 pmONT - EZE

2 stops16h 43mAmerican Airlines

Fri 2/710:30 pmEZE - ONT

1 stop16h 26mAmerican Airlines

Deal found 1/16

$4,692

Thu 2/610:30 pmONT - EZE

3 stops21h 55mAvianca

Thu 3/65:50 amEZE - ONT

3 stops20h 10mAvianca

Deal found 1/15

$1,402

Mon 2/246:00 amONT - EZE

1 stop22h 20mUnited Airlines

Thu 3/2011:55 pmEZE - ONT

2 stops26h 50mUnited Airlines

Deal found 1/16

$1,100

Mon 2/2410:51 amONT - EZE

1 stop18h 38mAmerican Airlines

Tue 3/189:30 pmEZE - ONT

1 stop16h 31mAmerican Airlines

Deal found 1/16

$1,800

Fri 2/285:10 pmONT - EZE

2 stops58h 50mDelta

Tue 3/188:55 pmEZE - ONT

2 stops30h 50mDelta

Deal found 1/16

$1,460

One-way flights from Ontario to Buenos Aires
Search for one-way flight options from Ontario to Buenos Aires. Find affordable one-way fares based on user searches. Data last updated January 17, 2025.

Thu 3/2711:30 pmONT - EZE

3 stops25h 10mAvianca

Deal found 1/16

$424

Mon 3/36:00 amONT - EZE

1 stop22h 20mUnited Airlines

Deal found 1/16

$638

Mon 3/38:56 pmONT - EZE

3 stops25h 29mMultiple Airlines

Deal found 1/16

$645

Tue 1/217:05 amONT - EZE

1 stop20h 55mDelta

Deal found 1/16

$869

Mon 6/306:42 pmONT - EZE

2 stops23h 26mCopa Airlines

Deal found 1/16

$2,474

Wed 1/227:00 amONT - EZE

3 stops47h 50mBritish Airways

Deal found 1/16

$4,266

Find flights from Ontario to Buenos Aires within your budget

Fly from

Fly to

Route

Depart

Return

Price

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Tue 4/1

6:05 am-8:00 am

1 stop21h 55m

Buenos Aires Ministro Pistarini

Wed 4/9

9:00 pm-8:42 pm

2 stops27h 42m

$1,030

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 3/6

10:30 pm-4:40 am

3 stops25h 10m

Buenos Aires Ministro Pistarini

Mon 3/31

2:30 am-9:55 pm

3 stops23h 25m

$1,282

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Fri 2/28

5:10 pm-9:00 am

2 stops58h 50m

Buenos Aires Ministro Pistarini

Tue 3/18

8:55 pm-11:45 pm

2 stops30h 50m

$1,460

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 2/24

10:51 am-10:29 am

1 stop18h 38m

Buenos Aires Ministro Pistarini

Tue 3/18

9:30 pm-10:01 am

1 stop16h 31m

$1,800

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 3/27

11:30 pm-4:40 am

3 stops25h 10m

$424

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 3/3

6:00 am-9:20 am

1 stop22h 20m

$638

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 3/3

8:56 pm-3:25 am

3 stops25h 29m

$645

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 6/30

12:00 pm-9:45 am

1 stop17h 45m

$878

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 6/30

6:42 pm-10:08 pm

2 stops23h 26m

$2,474

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Wed 1/22

7:00 am-11:50 am

3 stops47h 50m

$4,266

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/16

Compare providers for flights from Ontario to Buenos Aires

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Buenos Aires in January.

Provider	Price Accuracy	Trust Score*
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
Expedia	Price Accuracy1 star	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Ontario-Buenos Aires flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Ontario-Buenos Aires flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Ontario-Buenos Aires flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-Buenos Aires flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Buenos Aires flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Ontario with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to Buenos Aires

Get recent, data-driven insights about flights from Ontario to Buenos Aires including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario to Buenos Aires?

Currently, April is the cheapest month in which you can book a flight from Ontario to Buenos Aires (average of $795). Flying from Ontario to Buenos Aires in December is currently the most expensive (average of $1,260). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to BUE?

One of the essential ways to save on airfare from Ontario to Buenos Aires is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 41% on airfare.

Rainfall in Buenos Aires by month

In terms of precipitation, rainfall in Buenos Aires ranges from 2.0 - 3.9 inches per month. January is typically the wettest month, when rainfall can reach 3.9 in. June is typically the driest time to visit Buenos Aires when rainfall is around 2.0 in.

Temperature in Buenos Aires by month

If weather is an important factor for your trip to Buenos Aires, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Buenos Aires

See what other customers who have flown with United Airlines, Avianca and American Airlines from Ontario to Buenos Aires have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

8,511 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

8,511 reviews

Delta

8.0

Very good

8,511 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Copa Airlines

7.7

Good

1,658 reviews

Delta

8.0

Very good

8,511 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,965 reviews

Delta

8.0

Very good

8,511 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

8,511 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Avianca

6.9

Okay

2,573 reviews

Delta

8.0

Very good

8,511 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from Ontario to Buenos Aires?
Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Buenos Aires. You should not have trouble finding flights to Buenos Aires from Ontario; the airport handles an average of 0 outbound flights to Buenos Aires per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Ontario airport to Buenos Aires. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.
What are the cheapest airlines flying from Ontario to Buenos Aires round-trip?
According to our current data, United Airlines ($1,030), Avianca ($1,282), and Delta ($1,460) offers the cheapest pricing from Ontario to Buenos Aires.
What are the cheapest airlines to fly from Ontario to Buenos Aires one-way?
To fly one-way, consider booking your trip with Avianca, which is currently one of the cheapest options available, starting at $424. United Airlines flights start at $638 while deals on Delta start at $869 one-way.
Can I find deals for flights from Ontario to Buenos Aires that include hotel bookings?
Yes. In addition to deals on Ontario to Buenos Aires flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Buenos Aires?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Buenos Aires.
Can I find deals for business class flights from Ontario to Buenos Aires?
Yes. Cheapflights offers flight deals from Ontario to Buenos Aires by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Ontario to Buenos Aires?
Currently, April is the cheapest month in which you can book a flight from Ontario to Buenos Aires (average of $795). Flying from Ontario to Buenos Aires in December is currently the most expensive (average of $1,260). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Ontario to Buenos Aires

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$1,133	Average$1,659	FlexibilityNo cancel fee	On-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$424+ Cheap flights from Ontario (ONT) to Buenos Aires (BUE)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Buenos Aires with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to Buenos Aires

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Find flight deals from Ontario to Buenos Aires

Cheapest flights from Ontario to Buenos AiresExplore the most affordable flight options available from Ontario to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 17, 2025.

Explore the most affordable flight options available from Ontario to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 17, 2025.

Find flights from Ontario to Buenos Aires within your budget

Compare providers for flights from Ontario to Buenos Aires

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Buenos Aires in January.

Best time to book a flight from Ontario to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Ontario with our price prediction graph.

Travel insights for flights from Ontario to Buenos Aires

Get recent, data-driven insights about flights from Ontario to Buenos Aires including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario to Buenos Aires?

What is the cheapest time of day to fly from ONT to BUE?

Find hourly flight availability from Ontario to Buenos Aires. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 17, 2025.

Rainfall in Buenos Aires by month

Plan your trip to Buenos Aires by taking into account the average rainfall totals by month.

Temperature in Buenos Aires by month

Plan your trip to Buenos Aires by taking into account the average temperature totals by month.

Reviews of airlines servicing Buenos Aires

See what other customers who have flown with United Airlines, Avianca and American Airlines from Ontario to Buenos Aires have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Buenos Aires. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Ontario to Buenos Aires?

What are the cheapest airlines flying from Ontario to Buenos Aires round-trip?

What are the cheapest airlines to fly from Ontario to Buenos Aires one-way?

Can I find deals for flights from Ontario to Buenos Aires that include hotel bookings?

How can I find direct flights from Ontario to Buenos Aires?

Can I find deals for business class flights from Ontario to Buenos Aires?

What is the cheapest month to book a flight from Ontario to Buenos Aires?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Ontario to Buenos Aires

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Ontario to Buenos Aires
Explore the most affordable flight options available from Ontario to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 17, 2025.