Flight OddsSouthwest Airlines · Sacramento, CA to Salt Lake City, UT · 29 flights observed, 2025-07-01 to 2025-08-04 · 532 mi
WN4538 covers more than one route in the data window — the stats below are for SMF → SLC, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN4538 on time?
Across 29 flights on SMF → SLC from 2025-07-01 to 2025-08-04, WN4538 arrived within 15 minutes of schedule 90% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +19 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 | 26 | 90% |
| 16-30 min | 0 | 0% |
| 31-60 min | 1 | 3% |
| 61-120 min | 2 | 7% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 26 | 88% | +2 min |
| 2025-08 | 3 | 100% | -10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 5 | 60% |
| Wed | 5 | 80% |
| Thu | 5 | 100% |
| Fri | 4 | 100% |
| Sat | No data | — |
| Sun | 5 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…