Flight OddsWN4421 SAT → STL
Southwest Airlines · San Antonio, TX to St. Louis, MO · 26 flights observed, 2025-10-02 to 2025-10-31 · 786 mi
WN4421 covers more than one route in the data window — the stats below are for SAT → STL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
-3 min
90th percentile
+21 min
Cancellation rate
0%
How often is WN4421 on time?
Across 26 flights on SAT → STL from 2025-10-02 to 2025-10-31, WN4421 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +21 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 | 23 | 88% |
| 16-30 min | 1 | 4% |
| 31-60 min | 1 | 4% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 26 | 88% | +6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 100% |
| Tue | 4 | 100% |
| Wed | 4 | 100% |
| Thu | 5 | 100% |
| Fri | 5 | 80% |
| Sat | No data | — |
| Sun | 4 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…