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Cheap flights Ontario — Buenos Aires

Ontario (ONT, US) Buenos Aires (BUE, AR)
from $492 9 813 km ~12h 3m 2 flights found 2 airlines cheapest on Wednesday
Reverse route
How many travellers?
Adults
12+ years
1
Children
2–11 years
0
Infants
under 2
0
Choose your departure date
Cheapest: $492 on 25.11.2026
Prices shown are from searches by other travellers over the last 24 hours. Missing a date? Click any day — we'll find tickets anyway.
November 2026
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December 2026
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January 2027
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Prices found for 2 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Cheapest flights found
25 Nov 2026, Wed
Frontier Airlines F9 1500
17:45
ONT Ontario International Airport
08:58
EZE Ministro Pistarini Airport
15h 13m 2 stops
Mytrip.com
$492
View this ticket
19 Dec 2026, Sat
United Airlines UA 2267
16:55
ONT Ontario International Airport
05:59
EZE Ministro Pistarini Airport
13h 4m 1 stop
Trip.com
$1 341
View this ticket
Route characteristics
Distance
9 813 km
Flight time
12h 3m
Time difference
+4h
Minimum price
from $492 (25.11.2026)
Average price
$917
Maximum price
$1 341
Cheapest day
Wednesday
Departure airports (1)
ONT Ontario International Airport
Arrival airports (1)
EZE Ministro Pistarini Airport
Airlines (2)
F9 Frontier Airlines UA United Airlines
Agencies (2)
Mytrip.com Trip.com
Prices by day of week
Wednesday
$492
avg $492
Cheapest
Saturday
$1 341
avg $1 341
Price trend by month
November 2026
from $492
avg $492
1 flights
December 2026
from $1 341
avg $1 341
1 flights
Airlines — cheapest prices 2
Frontier Airlines
Frontier Airlines
Low-cost 1 flights · 1 days
$492
United Airlines
United Airlines
1 flights · 1 days
$1 341
Where to buy tickets 2
Mytrip.com
1 tickets · 1 days
from $492
Trip.com
1 tickets · 1 days
from $1 341
Airports

From — Ontario (1)

  • ONT Ontario International Airport

To — Buenos Aires (1)

  • EZE Ministro Pistarini Airport
Other destinations from Ontario
Albuquerque
US
Accra
GH
Nantucket
US
Adelaide
AU
San Andres Island
CO
Malaga
ES · Hub
Auckland
NZ
Almaty
KZ
Alicante
ES
Ahmedabad
IN
Amsterdam
NL · Hub
Anchorage
US
Frequently asked questions about the route Ontario — Buenos Aires
How long is the flight from Ontario to Buenos Aires?
Approximate flight time — 12h 3m. This is an average for a direct flight. With connections, the time may be longer.
What is the distance from Ontario to Buenos Aires?
The straight-line distance — 9 813 km.
How much do flights from Ontario to Buenos Aires cost?
The minimum price over 3 months — from $492 on 25.11.2026.
What is the average ticket price?
The average price — $917. Range: $492 — $1 341.
What is the time difference between Ontario and Buenos Aires?
The difference — +4h.
From which airports does Ontario operate flights?
From Ontario: ONT (Ontario International Airport).
To which airports in Buenos Aires do flights arrive?
To Buenos Aires: EZE (Ministro Pistarini Airport).
Which airlines fly this route?
This route is served by 2 airlines: Frontier Airlines, United Airlines.
Which day of the week is cheapest?
The cheapest day of the week — Wednesday.
When is the best time to buy tickets?
Optimal — 1–3 months before departure. Check the calendar above — it shows the best dates.
How do I book flights?
Click "View this ticket" on any flight card — you'll be redirected to the booking page with this specific ticket pre-selected.
About the route Ontario — Buenos Aires

Flights Ontario — Buenos Aires is a popular route. The straight-line distance is 9 813 km. Flight time 12h 3m. Time difference +4h.

From Ontario (ONT) flights depart from 1 airport: ONT. To Buenos Aires (BUE) — 1 arrival airport: EZE.

2 airlines operate on this route: Frontier Airlines, United Airlines.

The minimum price for the next 3 months — from $492 (25.11.2026). The cheapest dates are highlighted in the calendar above.

The average ticket price — $917, ranging from $492 to $1 341. Book 1–3 months in advance to get the best deals.

Cheapest day to fly — Wednesday.

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