Flight OddsWN2578 DEN → ONT
Southwest Airlines · Denver, CO to Ontario, CA · 36 flights observed, 2025-11-02 to 2026-01-05 · 819 mi
WN2578 covers more than one route in the data window — the stats below are for DEN → ONT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
56%
Median delay
+14 min
90th percentile
+87 min
Cancellation rate
0%
How often is WN2578 on time?
Across 36 flights on DEN → ONT from 2025-11-02 to 2026-01-05, WN2578 arrived within 15 minutes of schedule 56% of the time. The median arrival delay was +14 min, and the worst 10% of flights arrived +87 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 | 20 | 56% |
| 16-30 min | 3 | 8% |
| 31-60 min | 6 | 17% |
| 61-120 min | 5 | 14% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 17 | 76% | +15 min |
| 2025-12 | 15 | 33% | +41 min |
| 2026-01 | 4 | 50% | +24 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 50% |
| Tue | 3 | 33% |
| Wed | 1 | 0% |
| Thu | 3 | 67% |
| Fri | 8 | 88% |
| Sat | 5 | 40% |
| Sun | 10 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…