Flight OddsSEA → STL Southwest Airlines
Southwest Airlines · Seattle, WA to St. Louis, MO · 103 flights, 2025-07-01 to 2026-06-30 · aggregated across 8 flight numbers
On-time arrival
66%
Median delay
+8 min
90th percentile
+46 min
Cancellation rate
0%
How on-time is Southwest Airlines from SEA to STL?
Across every Southwest Airlines flight number on SEA → STL (103 flights, 2025-07-01 to 2026-06-30), 66% arrived within 15 minutes of schedule. Median arrival delay +8 min; the worst 10% ran +46 min or later. 0% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 67 | 66% |
| 16-30 min | 12 | 12% |
| 31-60 min | 18 | 18% |
| 61-120 min | 5 | 5% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 60% | +18 min |
| 2025-08 | 23 | 57% | +20 min |
| 2025-09 | 21 | 57% | +18 min |
| 2026-06 | 28 | 86% | +0 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 17 | 71% |
| Tue | 9 | 56% |
| Wed | 8 | 75% |
| Thu | 17 | 59% |
| Fri | 17 | 65% |
| Sat | 18 | 67% |
| Sun | 16 | 69% |
WN flight numbers on SEA → STL
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…