SJC → ONTSan Jose to Ontario

live

Direct flights from San Jose (SJC) to Ontario (ONT): 7 nonstop departures observed each week across 1 airline. 77% of the last 26 operated flights arrived within 15 minutes of schedule. The median arrival is 6 minutes early. No cancellations were recorded across the 26 tracked flights. The nonstop covers 536 km, an estimated 1 hour 11 minutes in the air. Measured by Pro Flight Search from live flight boards at San Jose and Ontario. Updated 16 October 2026 at 05:18 UTC.

SJC San Jose busy · +23
ONT Ontario busy · +18
536 km · ~1h 11m est.
dep bank 06:35–21:257x weekly
Runs mixed · 1 airline · 7x weekly · nonstop
77% on time

of the last 26 operated SJC → ONT flights arrived within 15 minutes

Median arrival delay is −6 min. 0 of 26 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−6 minacross the last 26 operated legs
Flight time~1h 11mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 26

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Southwest AirlinesWN76% on time

Flights WN3534 06:35 Su · WN442 06:45 Mo Th Fr · WN2475 07:25 Tu We · WN2121 09:30 Sa

History

operated legs · board outcomes
10-15WN3826dep +13 → arr−3
10-15WN442dep +7 → arr−16
10-15WN862dep +8 → arr−8
10-15WN962dep +35 → arr+17
10-14WN1130dep +13 → arr−13
10-14WN2475dep +3 → arr−25
10-14WN862dep +37 → arr−2
10-13WN1130dep +23 → arr−1
10-13WN2475dep +6 → arr−20
10-13WN862dep +45 → arr+47
10-12WN3826dep +13 → arr−9
10-12WN442dep +7 → arr−20
10-12WN862dep +12 → arr+17
10-12WN962dep +5 → arr−24
10-111I497dep +0 → arr+7
10-11WN1198dep +32 → arr+5
10-11WN1341dep +85 → arr+61
10-11WN3534dep +5 → arr−22
10-11WN3826dep +9 → arr−18
10-10WN2121dep +10 → arr−16
10-10WN3826dep +2 → arr−25
10-10WN426dep +11 → arr−23
10-09WN3826dep +54 → arr+33
10-09WN442dep +24 → arr−3
10-09WN862dep +23 → arr−6
10-09WN962arrived+16

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
SJCSan Jose +23 min busy 🌤 clear · SE 6 kt Full SJC delay board →
ONTOntario +18 min busy 🌤 clear · NE 20 kt Full ONT delay board →

Weather lens

Current conditions put the pressure at SJC and ONT: 45% odds of a 15+ minute delay and around +8 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the San Jose to Ontario route actually runs

Pro Flight Search records official board updates for nonstop SJC to ONT flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — San Jose (SJC) to Ontario (ONT) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/SJC-ONT
How we measure this →

SJC to ONT questions

Is SJC–ONT running on time right now?

Mostly on schedule. The departure side at SJC is the weaker end, route health score 73/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on SJC–ONT?

Operators schedule morning departures around 06:35 and evening departures around 17:00 from SJC. Earlier flights typically land before destination-airport delays accumulate later in the day; check the ONT delay card to confirm conditions when you'd arrive.

How long is the flight from SJC to ONT?

Great-circle distance is 536 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 68–76 min gate-to-gate on this route.

How often does SJC–ONT fly?

Southwest Airlines runs the route with about 25 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.