Flight OddsWN3983 SJC → ONT
Southwest Airlines · San Jose, CA to Ontario, CA · 60 flights observed, 2025-11-02 to 2026-01-05 · 333 mi
WN3983 covers more than one route in the data window — the stats below are for SJC → ONT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
78%
Median delay
-6 min
90th percentile
+25 min
Cancellation rate
0%
How often is WN3983 on time?
Across 60 flights on SJC → ONT from 2025-11-02 to 2026-01-05, WN3983 arrived within 15 minutes of schedule 78% of the time. The median arrival delay was -6 min, and the worst 10% of flights arrived +25 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 | 47 | 78% |
| 16-30 min | 9 | 15% |
| 31-60 min | 3 | 5% |
| 61-120 min | 1 | 2% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 26 | 88% | -3 min |
| 2025-12 | 29 | 72% | +3 min |
| 2026-01 | 5 | 60% | +7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 10 | 80% |
| Tue | 9 | 100% |
| Wed | 9 | 89% |
| Thu | 8 | 100% |
| Fri | 9 | 33% |
| Sat | 5 | 80% |
| Sun | 10 | 70% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…