Flight OddsSouthwest Airlines · Salt Lake City, UT to Denver, CO · 25 flights observed, 2025-07-01 to 2025-08-04 · 391 mi
WN1640 covers more than one route in the data window — the stats below are for SLC → DEN, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN1640 on time?
Across 25 flights on SLC → DEN from 2025-07-01 to 2025-08-04, WN1640 arrived within 15 minutes of schedule 44% of the time. The median arrival delay was +29 min, and the worst 10% of flights arrived +134 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 | 44% |
| 16-30 min | 2 | 8% |
| 31-60 min | 3 | 12% |
| 61-120 min | 5 | 20% |
| 2+ hrs | 4 | 16% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 23 | 43% | +60 min |
| 2025-08 | 2 | 50% | +38 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 60% |
| Tue | 5 | 40% |
| Wed | 5 | 40% |
| Thu | 5 | 40% |
| Fri | 5 | 40% |
| Sat | No data | — |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…