WN3645 MIA → STL

Southwest Airlines · Miami, FL to St. Louis, MO · 18 flights observed, 2025-11-22 to 2026-01-04 · 1,068 mi

This flight has been on time less than half the time (28%) — expect a real chance of a delay.

WN3645 covers more than one route in the data window — the stats below are for MIA → STL, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
28%
Median delay
+35 min
90th percentile
+118 min
Cancellation rate
0%

How often is WN3645 on time?

Across 18 flights on MIA → STL from 2025-11-22 to 2026-01-04, WN3645 arrived within 15 minutes of schedule 28% of the time. The median arrival delay was +35 min, and the worst 10% of flights arrived +118 min or later. 0% of flights were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time528%
16-30 min422%
31-60 min317%
61-120 min422%
2+ hrs211%

Performance by month

MonthFlightsOn-timeAvg delay
2025-11450%+18 min
2025-121118%+64 min
2026-01333%+41 min

Performance by day of week

DayFlightsOn-time
Mon333%
Tue333%
Wed10%
ThuNo data—
Fri333%
Sat520%
Sun333%

Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…