Flight OddsSTL → DCA Southwest Airlines
Southwest Airlines · St. Louis, MO to Washington, DC · 1,403 flights, 2025-07-01 to 2026-06-30 · aggregated across 66 flight numbers
On-time arrival
73%
Median delay
-2 min
90th percentile
+52 min
Cancellation rate
1%
How on-time is Southwest Airlines from STL to DCA?
Across every Southwest Airlines flight number on STL → DCA (1,403 flights, 2025-07-01 to 2026-06-30), 73% arrived within 15 minutes of schedule. Median arrival delay -2 min; the worst 10% ran +52 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 1,003 | 73% |
| 16-30 min | 137 | 10% |
| 31-60 min | 120 | 9% |
| 61-120 min | 75 | 5% |
| 2+ hrs | 38 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 112 | 54% | +33 min |
| 2025-08 | 117 | 75% | +8 min |
| 2025-09 | 116 | 80% | +4 min |
| 2025-10 | 120 | 79% | +6 min |
| 2025-11 | 109 | 75% | +11 min |
| 2025-12 | 120 | 76% | +5 min |
| 2026-01 | 109 | 78% | +4 min |
| 2026-02 | 102 | 74% | +10 min |
| 2026-03 | 115 | 70% | +19 min |
| 2026-04 | 116 | 82% | +0 min |
| 2026-05 | 119 | 74% | +5 min |
| 2026-06 | 118 | 59% | +16 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 200 | 67% |
| Tue | 210 | 82% |
| Wed | 206 | 78% |
| Thu | 205 | 65% |
| Fri | 203 | 73% |
| Sat | 149 | 84% |
| Sun | 200 | 66% |
WN flight numbers on STL → DCA
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…