Flight OddsWN3977 SMF → ONT
Southwest Airlines · Sacramento, CA to Ontario, CA · 64 flights observed, 2025-11-02 to 2026-01-05 · 390 mi
WN3977 covers more than one route in the data window — the stats below are for SMF → ONT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
95%
Median delay
-11 min
90th percentile
+6 min
Cancellation rate
2%
How often is WN3977 on time?
Across 64 flights on SMF → ONT from 2025-11-02 to 2026-01-05, WN3977 arrived within 15 minutes of schedule 95% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +6 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 59 | 95% |
| 16-30 min | 0 | 0% |
| 31-60 min | 1 | 2% |
| 61-120 min | 1 | 2% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 28 | 100% | -13 min |
| 2025-12 | 29 | 93% | -3 min |
| 2026-01 | 5 | 80% | +18 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 9 | 100% |
| Tue | 9 | 89% |
| Wed | 9 | 100% |
| Thu | 8 | 88% |
| Fri | 8 | 100% |
| Sat | 9 | 89% |
| Sun | 10 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…