Flight OddsSouthwest Airlines · Kansas City, MO to Las Vegas, NV · 36 flights observed, 2025-11-02 to 2026-01-05 · 1,139 mi
WN3521 covers more than one route in the data window — the stats below are for MCI → LAS, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN3521 on time?
Across 36 flights on MCI → LAS from 2025-11-02 to 2026-01-05, WN3521 arrived within 15 minutes of schedule 58% of the time. The median arrival delay was +11 min, and the worst 10% of flights arrived +62 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 | 21 | 58% |
| 16-30 min | 1 | 3% |
| 31-60 min | 10 | 28% |
| 61-120 min | 3 | 8% |
| 2+ hrs | 1 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 17 | 59% | +11 min |
| 2025-12 | 15 | 60% | +33 min |
| 2026-01 | 4 | 50% | +31 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 67% |
| Tue | 3 | 67% |
| Wed | 1 | 0% |
| Thu | 3 | 67% |
| Fri | 8 | 50% |
| Sat | 5 | 40% |
| Sun | 10 | 70% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…