Flight OddsWN4550 STL → MIA
Southwest Airlines · St. Louis, MO to Miami, FL · 33 flights observed, 2026-03-05 to 2026-04-06 · 1,068 mi
WN4550 covers more than one route in the data window — the stats below are for STL → MIA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
74%
Median delay
-4 min
90th percentile
+52 min
Cancellation rate
6%
How often is WN4550 on time?
Across 33 flights on STL → MIA from 2026-03-05 to 2026-04-06, WN4550 arrived within 15 minutes of schedule 74% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +52 min or later. 6% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 23 | 74% |
| 16-30 min | 1 | 3% |
| 31-60 min | 4 | 13% |
| 61-120 min | 3 | 10% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 25 | 76% | +10 min |
| 2026-04 | 6 | 67% | +9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 50% |
| Tue | 4 | 75% |
| Wed | 4 | 100% |
| Thu | 5 | 100% |
| Fri | 5 | 60% |
| Sat | 5 | 80% |
| 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…