Flight OddsWN4478 SFO → DEN
Southwest Airlines · San Francisco, CA to Denver, CO · 30 flights observed, 2025-07-01 to 2025-08-04 · 967 mi
WN4478 covers more than one route in the data window — the stats below are for SFO → DEN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
57%
Median delay
+11 min
90th percentile
+98 min
Cancellation rate
0%
How often is WN4478 on time?
Across 30 flights on SFO → DEN from 2025-07-01 to 2025-08-04, WN4478 arrived within 15 minutes of schedule 57% of the time. The median arrival delay was +11 min, and the worst 10% of flights arrived +98 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 | 17 | 57% |
| 16-30 min | 3 | 10% |
| 31-60 min | 4 | 13% |
| 61-120 min | 4 | 13% |
| 2+ hrs | 2 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 27 | 59% | +30 min |
| 2025-08 | 3 | 33% | +46 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 20% |
| Tue | 5 | 100% |
| Wed | 5 | 100% |
| Thu | 5 | 20% |
| Fri | 5 | 40% |
| Sat | No data | — |
| Sun | 5 | 60% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…