Flights Ontario → San Jose
ONT → SJC
Route overview
The flight route from Ontario to San Jose operates with a Boeing 737-300 and has an on-time performance rate of 83%, with an average delay of 8.1 minutes per flight. Over the course of a year, this route sees approximately 312 flights, serving a destination airport that handles around 11,333,723 passengers annually.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The Ontario (ONT) → San Jose (SJC) route is operated by Southwest Airlines. Across 422 flights monitored in recent months, 83% arrived on time (within 15 min of schedule), with an average delay of 7 minutes. The cancellation rate is 0.00%. FlightGuard's average computed risk is 16.6/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At San Jose the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from Ontario the average ATFM delay is 2.0 minutes.
Heading to San Jose: what to expect in this direction
Flying from Ontario (ONT) to San Jose (SJC) heads north-west for about 536 km, a flight time of roughly 1h 5m.
Departures from Ontario on this leg cluster in the overnight window: about 45% of ONT-SJC flights take off then.
Air-traffic congestion: departing Ontario the average ATFM delay is 2.0 min (airspace/NAS (BTS)); arriving into San Jose it is 2.0 min (atfm).
Across 422 tracked ONT-SJC flights, 83% left on time with an average delay of 7 min and a 0.0% cancellation rate.
Route facts
Flights on this route
Check the risk of a specific flight.
Flexible on this trip? Compare flights
Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| Southwest Airlines (WN) | 73% | 6 min | 3.1% |
Airlines operating ONT-SJC
Airports
Frequently asked questions about ONT-SJC
On the Ontario (ONT) -> San Jose (SJC) route, on-time performance is 83% with an average delay of 7 minutes, based on 422 tracked flights.
The cancellation rate on Ontario-San Jose is 0.00% across 422 monitored flights.
The route is operated by 1 airline: Southwest Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at San Jose, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
