Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
WN 3845 · Ontario (ONT) → San Jose (SJC)
Sold by Southwest. Still flying: 55 of the last 56 days (Daily).
Arrives on time70%within 15 minutes, of 57 flights
Cancelled0.0%of scheduled flights
An hour or more late12%of flights that operated
When late, on average92 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves ONT
- 16:35
- Arrives SJC
- 17:45
- Flight time
- 1h 10m
- Days flown, last 8 weeks
- 55 of 56
Each square is a day, Sat Jun 6 to Fri Jul 31, two weeks per row (each column is the same weekday); filled = flew.
How late it arrives
Share of flights that operated arriving more than this late.
Horizontal: minutes late at arrival (0 to 3 hours). Vertical: share of flights later than that.
Its hour at ONT
All flights leaving Ontario (ONT) at 4–5 pm, wherever they’re going: 76% left within 15 minutes and 0.8% were cancelled (1,404 flights in the year). Other Southwest flights on this route →
Upcoming forecasts
Our odds that this flight is late or cancelled on the days we publish.