Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Ontario to Buenos Aires from $370

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 8/12. 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
1 adult, Economy, 0 bags

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
$825Multiple Airlines
Mon, Aug 10 - Fri, Aug 21
Multiple Airlines Logo
9:36 pm - 7:30 am
ONT
-
EZE
29h 54m
3 stops
Multiple Airlines Logo
1:35 am - 9:45 pm
EZE
-
ONT
24h 10m
2 stops
$843Multiple Airlines
Thu, Aug 27 - Wed, Sep 2
Multiple Airlines Logo
9:36 pm - 7:30 am
ONT
-
EZE
29h 54m
3 stops
Multiple Airlines Logo
1:35 am - 9:45 pm
EZE
-
ONT
24h 10m
2 stops
$848Multiple Airlines
Thu, Aug 27 - Wed, Sep 2
Multiple Airlines Logo
9:36 pm - 1:20 am
ONT
-
EZE
23h 44m
3 stops
Multiple Airlines Logo
4:50 pm - 9:45 pm
EZE
-
ONT
32h 55m
2 stops
$869Multiple Airlines
Wed, Jun 17 - Wed, Jun 24
Multiple Airlines Logo
9:36 pm - 6:45 am
ONT
-
EZE
29h 09m
3 stops
Multiple Airlines Logo
7:10 am - 9:45 pm
EZE
-
ONT
18h 35m
2 stops
$889Multiple Airlines
Tue, Sep 15 - Thu, Sep 24
Multiple Airlines Logo
9:36 pm - 8:15 am
ONT
-
EZE
30h 39m
3 stops
Multiple Airlines Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$893Multiple Airlines
Sun, Aug 9 - Fri, Aug 21
Multiple Airlines Logo
9:36 pm - 5:40 am
ONT
-
EZE
28h 04m
3 stops
Multiple Airlines Logo
1:35 am - 9:45 pm
EZE
-
ONT
24h 10m
2 stops
$894Multiple Airlines
Thu, Sep 3 - Wed, Sep 16
Multiple Airlines Logo
12:55 am - 3:40 pm
ONT
-
EZE
34h 45m
3 stops
Multiple Airlines Logo
4:50 pm - 9:45 pm
EZE
-
ONT
32h 55m
2 stops
$908Multiple Airlines
Mon, Jun 15 - Wed, Jun 24
Multiple Airlines Logo
12:55 am - 3:40 pm
ONT
-
EZE
34h 45m
3 stops
Multiple Airlines Logo
2:30 am - 9:45 pm
EZE
-
ONT
23h 15m
2 stops
$910Multiple Airlines
Fri, Sep 18 - Fri, Sep 25
Multiple Airlines Logo
12:55 am - 6:45 am
ONT
-
EZE
25h 50m
3 stops
Multiple Airlines Logo
9:15 pm - 11:05 pm
EZE
-
ONT
29h 50m
3 stops
$1,032Multiple Airlines
Tue, Aug 11 - Mon, Aug 17

Delta flights from Ontario to Buenos Aires

Our best Delta deals on Ontario to Buenos Aires flight tickets
Delta
Sep 15
ONT7:05 amOntario
22h 40m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Sep 24
EZE8:10 pmBuenos Aires Ministro Pistarini
25h 54m
1 stop
ONT6:04 pmOntario
$1,148
Delta
Oct 15
ONT10:59 pmOntario
30h 41m
2 stops
EZE9:40 amBuenos Aires Ministro Pistarini
Oct 22
EZE1:10 pmBuenos Aires Ministro Pistarini
33h 08m
2 stops
ONT6:18 pmOntario
$1,217

United Airlines flights from Ontario to Buenos Aires

Our best United Airlines deals on Ontario to Buenos Aires flight tickets
United Airlines
Sep 8
ONT6:00 amOntario
22h 00m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Sep 30
EZE9:00 pmBuenos Aires Ministro Pistarini
19h 12m
2 stops
ONT12:12 pmOntario
$1,152
United Airlines
Nov 9
ONT6:53 pmOntario
55h 27m
2 stops
EZE7:20 amBuenos Aires Ministro Pistarini
Nov 23
EZE11:55 pmBuenos Aires Ministro Pistarini
28h 11m
2 stops
ONT11:06 pmOntario
$1,173
United Airlines
Nov 9
ONT6:53 pmOntario
57h 27m
2 stops
EZE9:20 amBuenos Aires Ministro Pistarini
Nov 23
EZE11:55 pmBuenos Aires Ministro Pistarini
26h 26m
1 stop
ONT9:21 pmOntario
$1,186

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 June 7, 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 8/10

9:36 pm-3:00 am

3 stops25h 24m

Buenos Aires Ministro Pistarini

Fri 8/21

2:30 am-9:45 pm

2 stops23h 15m

$825

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 8/27

9:36 pm-7:30 am

3 stops29h 54m

Buenos Aires Ministro Pistarini

Wed 9/2

1:35 am-9:45 pm

2 stops24h 10m

$843

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 8/27

9:36 pm-7:30 am

3 stops29h 54m

Buenos Aires Ministro Pistarini

Wed 9/2

1:35 am-9:45 pm

2 stops24h 10m

$848

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Wed 6/17

9:36 pm-1:20 am

3 stops23h 44m

Buenos Aires Ministro Pistarini

Wed 6/24

4:50 pm-9:45 pm

2 stops32h 55m

$869
Quickest round-trip

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Tue 9/15

9:36 pm-6:45 am

3 stops29h 09m

Buenos Aires Ministro Pistarini

Thu 9/24

7:10 am-9:45 pm

2 stops18h 35m

$889

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Sun 8/9

9:36 pm-8:15 am

3 stops30h 39m

Buenos Aires Ministro Pistarini

Fri 8/21

2:30 am-9:45 pm

2 stops23h 15m

$893

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Thu 9/3

9:36 pm-5:40 am

3 stops28h 04m

Buenos Aires Ministro Pistarini

Wed 9/16

1:35 am-9:45 pm

2 stops24h 10m

$894

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Mon 6/15

12:55 am-3:40 pm

3 stops34h 45m

Buenos Aires Ministro Pistarini

Wed 6/24

4:50 pm-9:45 pm

2 stops32h 55m

$908

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Fri 9/18

12:55 am-3:40 pm

3 stops34h 45m

Buenos Aires Ministro Pistarini

Fri 9/25

2:30 am-9:45 pm

2 stops23h 15m

$910

OntarioBuenos Aires

ONT - EZE

ONTEZE

Ontario

Tue 8/11

12:55 am-6:45 am

3 stops25h 50m

Buenos Aires Ministro Pistarini

Mon 8/17

9:15 pm-11:05 pm

3 stops29h 50m

$1,032

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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.
Search flight deals

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.

An easier way to manage your Buenos Aires trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 7/7
Tue 7/14
By creating a price alert you accept our terms of use and privacy policy.

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