Flight OddsWN3978 ONT → DEN
Southwest Airlines · Ontario, CA to Denver, CO · 17 flights observed, 2025-11-02 to 2026-01-05 · 819 mi
WN3978 covers more than one route in the data window — the stats below are for ONT → DEN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
65%
Median delay
+3 min
90th percentile
+36 min
Cancellation rate
0%
How often is WN3978 on time?
Across 17 flights on ONT → DEN from 2025-11-02 to 2026-01-05, WN3978 arrived within 15 minutes of schedule 65% of the time. The median arrival delay was +3 min, and the worst 10% of flights arrived +36 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 | 11 | 65% |
| 16-30 min | 4 | 24% |
| 31-60 min | 1 | 6% |
| 61-120 min | 1 | 6% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 12 | 58% | +14 min |
| 2025-12 | 4 | 75% | +4 min |
| 2026-01 | 1 | 100% | -22 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 100% |
| Tue | No data | — |
| Wed | No data | — |
| Thu | 3 | 100% |
| Fri | 5 | 40% |
| Sat | No data | — |
| Sun | 6 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…