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Cheap flights from Ontario to Buenos Aires from $456

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 5/4. 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 - 5:40 am
ONT
-
EZE
28h 04m
3 stops
Multiple Airlines Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$937Multiple Airlines
Mon, Jun 1 - Mon, Jun 8
Multiple Airlines Logo
12:55 am - 10:00 am
ONT
-
EZE
29h 05m
3 stops
Multiple Airlines Logo
9:15 pm - 11:05 pm
EZE
-
ONT
29h 50m
3 stops
$947Multiple Airlines
Tue, May 26 - Wed, Jun 3
Multiple Airlines Logo
9:36 pm - 5:40 am
ONT
-
EZE
28h 04m
3 stops
Multiple Airlines Logo
4:50 pm - 9:45 pm
EZE
-
ONT
32h 55m
2 stops
$971Multiple Airlines
Fri, Aug 21 - Fri, Oct 23
Multiple Airlines Logo
12:55 am - 9:16 am
ONT
-
EZE
28h 21m
3 stops
Multiple Airlines Logo
7:10 am - 9:45 pm
EZE
-
ONT
42h 35m
2 stops
$976Multiple Airlines
Thu, May 21 - Mon, Jun 1
Multiple Airlines Logo
9:36 pm - 5:40 am
ONT
-
EZE
28h 04m
3 stops
Multiple Airlines Logo
4:50 pm - 9:45 pm
EZE
-
ONT
32h 55m
2 stops
$980Multiple Airlines
Mon, Jun 1 - Mon, Jun 8
Multiple Airlines Logo
9:36 pm - 10:00 am
ONT
-
EZE
32h 24m
3 stops
Multiple Airlines Logo
4:50 pm - 9:45 pm
EZE
-
ONT
32h 55m
2 stops
$987Multiple Airlines
Sun, Sep 6 - Fri, Sep 18
Multiple Airlines Logo
9:36 pm - 5:40 am
ONT
-
EZE
28h 04m
3 stops
Multiple Airlines Logo
2:30 am - 11:05 pm
EZE
-
ONT
24h 35m
3 stops
$1,045Multiple Airlines
Mon, Jun 1 - Mon, Jun 8
Multiple Airlines Logo
9:36 pm - 11:30 am
ONT
-
EZE
33h 54m
3 stops
Multiple Airlines Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$1,059Multiple Airlines
Mon, May 11 - Mon, Jun 8
Multiple Airlines Logo
12:55 am - 8:15 am
ONT
-
EZE
27h 20m
3 stops
Multiple Airlines Logo
2:30 am - 11:05 pm
EZE
-
ONT
24h 35m
3 stops
$1,061Multiple Airlines
Sun, May 17 - Mon, Jun 29
Multiple Airlines Logo
9:36 pm - 9:16 am
ONT
-
EZE
31h 40m
3 stops
Multiple Airlines Logo
7:30 am - 9:55 pm
EZE
-
ONT
18h 25m
2 stops
$1,093Multiple Airlines
Thu, Oct 1 - Sat, Oct 31

United Airlines flights from Ontario to Buenos Aires

Our best United Airlines deals on Ontario to Buenos Aires flight tickets
United Airlines
Jun 8
ONT6:00 amOntario
22h 00m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
Jun 22
EZE9:00 pmBuenos Aires Ministro Pistarini
24h 28m
2 stops
ONT5:28 pmOntario
$1,151
United Airlines
Jun 15
ONT5:45 amOntario
22h 15m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Jul 15
EZE9:00 pmBuenos Aires Ministro Pistarini
28h 55m
1 stop
ONT9:55 pmOntario
$1,160
United Airlines
Jun 15
ONT6:30 pmOntario
33h 30m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
Jul 15
EZE9:00 pmBuenos Aires Ministro Pistarini
28h 55m
1 stop
ONT9:55 pmOntario
$1,164

Avianca flights from Ontario to Buenos Aires

Our best Avianca deals on Ontario to Buenos Aires flight tickets
Avianca
Jun 6
ONT11:35 pmOntario
21h 45m
2 stops
EZE1:20 amBuenos Aires Ministro Pistarini
Jun 19
EZE2:30 amBuenos Aires Ministro Pistarini
23h 15m
2 stops
ONT9:45 pmOntario
$1,192
Avianca
Jun 4
ONT11:35 pmOntario
21h 45m
2 stops
EZE1:20 amBuenos Aires Ministro Pistarini
Jun 10
EZE2:30 amBuenos Aires Ministro Pistarini
23h 15m
2 stops
ONT9:45 pmOntario
$1,229
Avianca
May 14
ONT11:35 pmOntario
20h 50m
2 stops
EZE12:25 amBuenos Aires Ministro Pistarini
May 21
EZE7:10 amBuenos Aires Ministro Pistarini
18h 35m
2 stops
ONT9:45 pmOntario
$1,280

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 April 21, 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 6/1

9:36 pm-5:40 am

3 stops28h 04m

Buenos Aires Ministro Pistarini

Mon 6/8

2:30 am-9:45 pm

2 stops23h 15m

$937

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Tue 5/26

12:55 am-10:00 am

3 stops29h 05m

Buenos Aires Ministro Pistarini

Wed 6/3

9:15 pm-11:05 pm

3 stops29h 50m

$947

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Fri 8/21

9:36 pm-5:40 am

3 stops28h 04m

Buenos Aires Ministro Pistarini

Fri 10/23

4:50 pm-9:45 pm

2 stops32h 55m

$971

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 5/21

12:55 am-9:16 am

3 stops28h 21m

Buenos Aires Ministro Pistarini

Mon 6/1

7:10 am-9:45 pm

2 stops42h 35m

$976

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 6/1

9:36 pm-5:40 am

3 stops28h 04m

Buenos Aires Ministro Pistarini

Mon 6/8

4:50 pm-9:45 pm

2 stops32h 55m

$980

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Sun 9/6

9:36 pm-10:00 am

3 stops32h 24m

Buenos Aires Ministro Pistarini

Fri 9/18

4:50 pm-9:45 pm

2 stops32h 55m

$987

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 6/1

9:36 pm-5:40 am

3 stops28h 04m

Buenos Aires Ministro Pistarini

Mon 6/8

2:30 am-11:05 pm

3 stops24h 35m

$1,045

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 5/11

9:36 pm-11:30 am

3 stops33h 54m

Buenos Aires Ministro Pistarini

Mon 6/8

2:30 am-9:45 pm

2 stops23h 15m

$1,059

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Sun 5/17

12:55 am-8:15 am

3 stops27h 20m

Buenos Aires Ministro Pistarini

Mon 6/29

2:30 am-11:05 pm

3 stops24h 35m

$1,061
Quickest round-trip

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 10/1

9:36 pm-9:16 am

3 stops31h 40m

Buenos Aires Ministro Pistarini

Sat 10/31

7:30 am-9:55 pm

2 stops18h 25m

$1,093

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 14% 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 57m

Direct flights

None
The fastest flight from Ontario to Buenos Aires takes 17h 57m
There are no direct flights from Ontario to Buenos Aires. There are no popular flight routes from Ontario to Buenos Aires.
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Frequently asked questions about flying 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 17h 57m.

  • 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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Thu 5/21
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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