Flight OddsWN548 STL → DCA
Southwest Airlines · St. Louis, MO to Washington, DC · 28 flights observed, 2026-03-05 to 2026-04-06 · 719 mi
WN548 covers more than one route in the data window — the stats below are for STL → DCA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
65%
Median delay
+5 min
90th percentile
+105 min
Cancellation rate
4%
How often is WN548 on time?
Across 28 flights on STL → DCA from 2026-03-05 to 2026-04-06, WN548 arrived within 15 minutes of schedule 65% of the time. The median arrival delay was +5 min, and the worst 10% of flights arrived +105 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 17 | 65% |
| 16-30 min | 4 | 15% |
| 31-60 min | 1 | 4% |
| 61-120 min | 1 | 4% |
| 2+ hrs | 3 | 12% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 21 | 67% | +40 min |
| 2026-04 | 5 | 60% | +11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 100% |
| Tue | 4 | 100% |
| Wed | 4 | 50% |
| Thu | 5 | 60% |
| Fri | 4 | 25% |
| Sat | No data | — |
| Sun | 5 | 60% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…