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Cheap flights Ontario — San Jose

Ontario (ONT, US) San Jose (SJO, CR)
from $350 4 341 km ~5h 36m 3 flights found 2 airlines cheapest on Tuesday
Reverse route
How many travellers?
Adults
12+ years
1
Children
2–11 years
0
Infants
under 2
0
Choose your departure date
Cheapest: $350 on 01.12.2026
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
Mo
Tu
We
Th
Fr
Sa
Su
December 2026
Mo
Tu
We
Th
Fr
Sa
Su
January 2027
Mo
Tu
We
Th
Fr
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Su
Prices found for 3 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Cheapest flights found
01 Dec 2026, Tue
United Airlines UA 1375
22:20
ONT Ontario International Airport
06:14
SJO Juan Santamaria International Airport
7h 54m 1 stop
Farera
$350
View this ticket
17 Nov 2026, Tue
Southwest Airlines WN 2499
05:25
ONT Ontario International Airport
14:00
SJO Juan Santamaria International Airport
8h 35m 2 stops
City.Travel
$384
View this ticket
05 Jan 2027, Tue
United Airlines UA 1375
20:45
ONT Ontario International Airport
06:00
SJO Juan Santamaria International Airport
9h 15m 2 stops
Авиасейлс
$489
View this ticket
Route characteristics
Distance
4 341 km
Flight time
5h 36m
Time difference
+2h
Minimum price
from $350 (01.12.2026)
Average price
$408
Maximum price
$489
Cheapest day
Tuesday
Departure airports (1)
ONT Ontario International Airport
Arrival airports (1)
SJO Juan Santamaria International Airport
Airlines (2)
UA United Airlines WN Southwest Airlines
Agencies (3)
Farera City.Travel Авиасейлс
Price trend by month
November 2026
from $384
avg $384
1 flights
December 2026
from $350
avg $350
1 flights
January 2027
from $489
avg $489
1 flights
Airlines — cheapest prices 2
United Airlines
United Airlines
2 flights · 2 days
$350
Southwest Airlines
Southwest Airlines
Low-cost 1 flights · 1 days
$384
Where to buy tickets 3
Farera
1 tickets · 1 days
from $350
City.Travel
1 tickets · 1 days
from $384
Авиасейлс
1 tickets · 1 days
from $489
Airports

From — Ontario (1)

  • ONT Ontario International Airport

To — San Jose (1)

  • SJO Juan Santamaria International 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 — San Jose
How long is the flight from Ontario to San Jose?
Approximate flight time — 5h 36m. This is an average for a direct flight. With connections, the time may be longer.
What is the distance from Ontario to San Jose?
The straight-line distance — 4 341 km.
How much do flights from Ontario to San Jose cost?
The minimum price over 3 months — from $350 on 01.12.2026.
What is the average ticket price?
The average price — $408. Range: $350 — $489.
What is the time difference between Ontario and San Jose?
The difference — +2h.
From which airports does Ontario operate flights?
From Ontario: ONT (Ontario International Airport).
To which airports in San Jose do flights arrive?
To San Jose: SJO (Juan Santamaria International Airport).
Which airlines fly this route?
This route is served by 2 airlines: United Airlines, Southwest Airlines.
Which day of the week is cheapest?
The cheapest day of the week — Tuesday.
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 — San Jose

Flights Ontario — San Jose is a popular route. The straight-line distance is 4 341 km. Flight time 5h 36m. Time difference +2h.

From Ontario (ONT) flights depart from 1 airport: ONT. To San Jose (SJO) — 1 arrival airport: SJO.

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

The minimum price for the next 3 months — from $350 (01.12.2026). The cheapest dates are highlighted in the calendar above.

The average ticket price — $408, ranging from $350 to $489. Book 1–3 months in advance to get the best deals.

Cheapest day to fly — Tuesday.

Other destinations in Costa Rica from Ontario
Liberia
CR

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