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Cheap flights from Ontario to Buenos Aires from $401

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 3/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:36 pm - 3:00 am
ONT
-
EZE
25h 24m
3 stops
Multiple Airlines Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$927Multiple Airlines
Mon, Jun 15 - Wed, Jun 17
Avianca Logo
11:35 pm - 5:00 am
ONT
-
EZE
25h 25m
3 stops
Avianca Logo
4:50 pm - 9:45 pm
EZE
-
ONT
32h 55m
2 stops
$947Avianca
Tue, May 5 - Fri, May 8
Multiple Airlines Logo
12:55 am - 10:00 am
ONT
-
EZE
29h 05m
3 stops
Multiple Airlines Logo
4:50 pm - 9:45 pm
EZE
-
ONT
32h 55m
2 stops
$955Multiple Airlines
Sun, May 31 - Mon, Jun 15
Multiple Airlines Logo
9:13 pm - 5:40 am
ONT
-
EZE
28h 27m
3 stops
Multiple Airlines Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$966Multiple Airlines
Mon, Jun 1 - Wed, Jun 3
Avianca Logo
11:35 pm - 5:00 am
ONT
-
EZE
25h 25m
3 stops
Avianca Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$975Avianca
Sat, May 30 - Mon, Jun 1
Avianca Logo
11:35 pm - 5:00 am
ONT
-
EZE
25h 25m
3 stops
Avianca Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$977Avianca
Thu, May 14 - Wed, May 20
Multiple Airlines Logo
9:13 pm - 10:00 am
ONT
-
EZE
32h 47m
3 stops
Multiple Airlines Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$985Multiple Airlines
Sun, Jun 14 - Fri, Jun 19
Multiple Airlines Logo
12:55 am - 5:40 am
ONT
-
EZE
24h 45m
3 stops
Multiple Airlines Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$1,025Multiple Airlines
Mon, Aug 10 - Mon, Aug 17
Avianca Logo
11:35 pm - 1:20 am
ONT
-
EZE
21h 45m
2 stops
Avianca Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$1,049Avianca
Tue, Sep 1 - Mon, Sep 14
Multiple Airlines Logo
11:35 pm - 5:00 am
ONT
-
EZE
25h 25m
3 stops
Multiple Airlines Logo
7:10 am - 11:05 pm
EZE
-
ONT
19h 55m
2 stops
$1,050Multiple Airlines
Thu, Apr 16 - Sat, Apr 25

Avianca flights from Ontario to Buenos Aires

Our best Avianca deals on Ontario to Buenos Aires flight tickets
Avianca
May 5
ONT11:35 pmOntario
25h 25m
3 stops
EZE5:00 amBuenos Aires Ministro Pistarini
May 8
EZE4:50 pmBuenos Aires Ministro Pistarini
32h 55m
2 stops
ONT9:45 pmOntario
$947
Avianca
May 30
ONT11:35 pmOntario
25h 25m
3 stops
EZE5:00 amBuenos Aires Ministro Pistarini
Jun 1
EZE2:30 amBuenos Aires Ministro Pistarini
23h 15m
2 stops
ONT9:45 pmOntario
$975
Avianca
May 14
ONT11:35 pmOntario
25h 25m
3 stops
EZE5:00 amBuenos Aires Ministro Pistarini
May 20
EZE2:30 amBuenos Aires Ministro Pistarini
23h 15m
2 stops
ONT9:45 pmOntario
$977

United Airlines flights from Ontario to Buenos Aires

Our best United Airlines deals on Ontario to Buenos Aires flight tickets
United Airlines
May 4
ONT6:00 amOntario
22h 00m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
May 14
EZE9:00 pmBuenos Aires Ministro Pistarini
27h 36m
2 stops
ONT8:36 pmOntario
$1,101
United Airlines
May 3
ONT1:40 pmOntario
38h 20m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
May 12
EZE9:00 pmBuenos Aires Ministro Pistarini
24h 52m
2 stops
ONT5:52 pmOntario
$1,121
United Airlines
May 3
ONT1:40 pmOntario
38h 20m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
May 14
EZE9:00 pmBuenos Aires Ministro Pistarini
40h 41m
2 stops
ONT9:41 amOntario
$1,128

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Buenos Aires that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 8, 2026.
Use the filters below to find and compare flights from Ontario to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 6/15

9:36 pm-3:00 am

3 stops25h 24m

Buenos Aires Ministro Pistarini

Wed 6/17

2:30 am-9:45 pm

2 stops23h 15m

$927

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Tue 5/5

11:35 pm-5:00 am

3 stops25h 25m

Buenos Aires Ministro Pistarini

Fri 5/8

4:50 pm-9:45 pm

2 stops32h 55m

$947

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Sun 5/31

12:55 am-10:00 am

3 stops29h 05m

Buenos Aires Ministro Pistarini

Mon 6/15

4:50 pm-9:45 pm

2 stops32h 55m

$955

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 6/1

9:13 pm-5:40 am

3 stops28h 27m

Buenos Aires Ministro Pistarini

Wed 6/3

2:30 am-9:45 pm

2 stops23h 15m

$966

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Sat 5/30

11:35 pm-5:00 am

3 stops25h 25m

Buenos Aires Ministro Pistarini

Mon 6/1

2:30 am-9:45 pm

2 stops23h 15m

$975

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 5/14

11:35 pm-5:00 am

3 stops25h 25m

Buenos Aires Ministro Pistarini

Wed 5/20

2:30 am-9:45 pm

2 stops23h 15m

$977

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Sun 6/14

9:13 pm-10:00 am

3 stops32h 47m

Buenos Aires Ministro Pistarini

Fri 6/19

2:30 am-9:45 pm

2 stops23h 15m

$985

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 8/10

12:55 am-5:40 am

3 stops24h 45m

Buenos Aires Ministro Pistarini

Mon 8/17

2:30 am-9:45 pm

2 stops23h 15m

$1,025
Quickest round-trip

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Tue 9/1

11:35 pm-1:20 am

2 stops21h 45m

Buenos Aires Ministro Pistarini

Mon 9/14

2:30 am-9:45 pm

2 stops23h 15m

$1,049

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 4/16

11:35 pm-5:00 am

3 stops25h 25m

Buenos Aires Ministro Pistarini

Sat 4/25

7:10 am-11:05 pm

2 stops19h 55m

$1,050

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Buenos Aires from

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

Can stopping save me money on Ontario to Buenos Aires flights?

You could potentially save up to 36% on your flight if you consider stops on a Ontario to Buenos Aires flight.

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

Fastest flight time

17h 45m

Direct flights

None
The fastest flight from Ontario to Buenos Aires takes 17h 45m
There are no direct flights from Ontario to Buenos Aires. There are no popular flight routes from Ontario to Buenos Aires.
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 45m.

  • 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.

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.

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Find better results for your trip to Argentina

Fly into one of these airports located in Buenos Aires

Airports listed have a maximum distance of 17.0 mi from Buenos Aires
Buenos Aires Jorge Newbery Airport
Buenos Aires Ministro Pistarini Airport