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 33% 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 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 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.

$545 Cheap Flights from Ontario to Buenos Aires in 2025

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Find the cheapest flights from Ontario to Buenos Aires

Round-trip

One-way

Last minute

Cheap round-trip flights

1:09 am - 1:00 pmONT-EZE

31h 51m3 stops

2:30 am - 11:13 pmEZE-ONT

24h 43m3 stops

$987

Find Deal

Mon, Aug 25 - Mon, Sep 1

6:05 am - 7:20 amONT-EZE

20h 15m1 stop

10:05 pm - 4:12 pmEZE-ONT

23h 07m1 stop

$1,025United Airlines

Find Deal

Tue, Nov 18 - Wed, Nov 26

9:11 pm - 3:45 amONT-EZE

26h 34m3 stops

6:15 pm - 11:13 pmEZE-ONT

32h 58m3 stops

$1,029

Find Deal

Fri, Sep 5 - Sat, Sep 20

6:04 am - 8:00 amONT-EZE

21h 56m1 stop

9:00 pm - 3:02 pmEZE-ONT

22h 02m2 stops

$1,030United Airlines

Find Deal

Wed, Sep 24 - Mon, Oct 6

6:00 am - 9:20 amONT-EZE

22h 20m1 stop

11:55 pm - 9:52 pmEZE-ONT

26h 57m1 stop

$1,037United Airlines

Find Deal

Wed, Dec 10 - Wed, Dec 24

11:25 pm - 12:10 amONT-EZE

20h 45m2 stops

6:50 am - 9:55 pmEZE-ONT

19h 05m2 stops

$1,120Avianca

Find Deal

Thu, Sep 4 - Sat, Sep 20

11:25 pm - 1:25 amONT-EZE

22h 00m3 stops

6:50 am - 9:55 pmEZE-ONT

19h 05m2 stops

$1,128Avianca

Find Deal

Tue, Aug 26 - Tue, Sep 2

11:55 am - 9:45 amONT-EZE

17h 50m1 stop

8:10 pm - 10:42 amEZE-ONT

18h 32m1 stop

$1,215Delta

Find Deal

Thu, Sep 11 - Sun, Sep 21

11:55 am - 9:45 amONT-EZE

17h 50m1 stop

8:10 pm - 10:26 amEZE-ONT

18h 16m1 stop

$1,245Delta

Find Deal

Thu, Sep 25 - Mon, Oct 6

7:00 am - 9:35 amONT-EZE

21h 35m2 stops

11:00 am - 7:42 pmEZE-ONT

37h 42m2 stops

$1,266LATAM Airlines

Find Deal

Thu, Dec 11 - Thu, Dec 18

United Airlines flights from Ontario to Buenos Aires

Our best United Airlines deals on Ontario to Buenos Aires flight tickets

United Airlines

Nov 18

ONT6:05 amOntario

20h 15m

1 stop

EZE7:20 amBuenos Aires Ministro Pistarini

Nov 26

EZE10:05 pmBuenos Aires Ministro Pistarini

23h 07m

1 stop

ONT4:12 pmOntario

$1,025

Find similar

United Airlines

Sep 24

ONT6:04 amOntario

21h 56m

1 stop

EZE8:00 amBuenos Aires Ministro Pistarini

Oct 6

EZE9:00 pmBuenos Aires Ministro Pistarini

22h 02m

2 stops

ONT3:02 pmOntario

$1,030

Find similar

United Airlines

Dec 10

ONT6:00 amOntario

22h 20m

1 stop

EZE9:20 amBuenos Aires Ministro Pistarini

Dec 24

EZE11:55 pmBuenos Aires Ministro Pistarini

26h 57m

1 stop

ONT9:52 pmOntario

$1,037

Find similar

Avianca flights from Ontario to Buenos Aires

Our best Avianca deals on Ontario to Buenos Aires flight tickets

Avianca

Sep 4

ONT11:25 pmOntario

20h 45m

2 stops

EZE12:10 amBuenos Aires Ministro Pistarini

Sep 20

EZE6:50 amBuenos Aires Ministro Pistarini

19h 05m

2 stops

ONT9:55 pmOntario

$1,120

Find similar

Avianca

Aug 26

ONT11:25 pmOntario

22h 00m

3 stops

EZE1:25 amBuenos Aires Ministro Pistarini

Sep 2

EZE6:50 amBuenos Aires Ministro Pistarini

19h 05m

2 stops

ONT9:55 pmOntario

$1,128

Find similar

Avianca

Sep 9

ONT11:25 pmOntario

22h 00m

3 stops

EZE1:25 amBuenos Aires Ministro Pistarini

Sep 15

EZE1:40 amBuenos Aires Ministro Pistarini

24h 15m

2 stops

ONT9:55 pmOntario

$1,133

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 8/25

1:09 am-1:00 pm

3 stops31h 51m

Buenos Aires Ministro Pistarini

Mon 9/1

2:30 am-11:13 pm

3 stops24h 43m

$987

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Tue 11/18

6:05 am-7:20 am

1 stop20h 15m

Buenos Aires Ministro Pistarini

Wed 11/26

10:05 pm-4:12 pm

1 stop23h 07m

$1,025

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Fri 9/5

9:11 pm-3:45 am

3 stops26h 34m

Buenos Aires Ministro Pistarini

Sat 9/20

6:15 pm-11:13 pm

3 stops32h 58m

$1,029

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Wed 9/24

6:04 am-8:00 am

1 stop21h 56m

Buenos Aires Ministro Pistarini

Mon 10/6

9:00 pm-3:02 pm

2 stops22h 02m

$1,030

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Wed 12/10

6:00 am-9:20 am

1 stop22h 20m

Buenos Aires Ministro Pistarini

Wed 12/24

11:55 pm-9:52 pm

1 stop26h 57m

$1,037

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 9/4

11:25 pm-12:10 am

2 stops20h 45m

Buenos Aires Ministro Pistarini

Sat 9/20

6:50 am-9:55 pm

2 stops19h 05m

$1,120

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Tue 8/26

11:25 pm-1:25 am

3 stops22h 00m

Buenos Aires Ministro Pistarini

Tue 9/2

6:50 am-9:55 pm

2 stops19h 05m

$1,128

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 9/11

11:55 am-9:45 am

1 stop17h 50m

Buenos Aires Ministro Pistarini

Sun 9/21

8:10 pm-10:42 am

1 stop18h 32m

$1,215

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 9/25

11:55 am-9:45 am

1 stop17h 50m

Buenos Aires Ministro Pistarini

Mon 10/6

8:10 pm-10:26 am

1 stop18h 16m

$1,245

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 12/11

7:00 am-9:35 am

2 stops21h 35m

Buenos Aires Ministro Pistarini

Thu 12/18

11:00 am-7:42 pm

2 stops37h 42m

$1,266

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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.

When to book flights from Ontario to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Buenos Aires according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

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

Best Price Found	$545
Fastest flight time	17h 16m
Direct flights	None
Airports in Buenos Aires	1 airport

The best one-way flight to Buenos Aires from Ontario in the past 72 hours is $545. The best round-trip flight deal from Ontario to Buenos Aires found on momondo in the last 72 hours is $987.

The fastest flight from Ontario to Buenos Aires takes 17h 16m

There are no direct flights from Ontario to Buenos Aires. Popular non-direct route for this connection is Ontario Airport - Buenos Aires Ministro Pistarini Airport.

There is 1 airport near Buenos Aires: Buenos Aires Ministro Pistarini (EZE)

Search flight deals

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 17h 50m.
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 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.

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.