Flight OddsWN4503 STL → LAS
Southwest Airlines · St. Louis, MO to Las Vegas, NV · 58 flights observed, 2026-01-06 to 2026-03-04 · 1,371 mi
WN4503 covers more than one route in the data window — the stats below are for STL → LAS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
91%
Median delay
-9 min
90th percentile
+13 min
Cancellation rate
0%
How often is WN4503 on time?
Across 58 flights on STL → LAS from 2026-01-06 to 2026-03-04, WN4503 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +13 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 | 53 | 91% |
| 16-30 min | 4 | 7% |
| 31-60 min | 1 | 2% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 26 | 92% | -13 min |
| 2026-02 | 28 | 89% | -5 min |
| 2026-03 | 4 | 100% | +1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 88% |
| Tue | 9 | 100% |
| Wed | 9 | 89% |
| Thu | 8 | 75% |
| Fri | 8 | 88% |
| Sat | 8 | 100% |
| Sun | 8 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…