Flight OddsWN3997 ONT → SJC
Southwest Airlines · Ontario, CA to San Jose, CA · 42 flights observed, 2025-11-02 to 2026-01-05 · 333 mi
WN3997 covers more than one route in the data window — the stats below are for ONT → SJC, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
93%
Median delay
-13 min
90th percentile
+12 min
Cancellation rate
0%
How often is WN3997 on time?
Across 42 flights on ONT → SJC from 2025-11-02 to 2026-01-05, WN3997 arrived within 15 minutes of schedule 93% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +12 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 39 | 93% |
| 16-30 min | 0 | 0% |
| 31-60 min | 1 | 2% |
| 61-120 min | 2 | 5% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 22 | 86% | +1 min |
| 2025-12 | 18 | 100% | -14 min |
| 2026-01 | 2 | 100% | +3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 86% |
| Tue | 6 | 100% |
| Wed | 8 | 100% |
| Thu | 8 | 100% |
| Fri | 6 | 83% |
| Sat | No data | — |
| Sun | 7 | 86% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…