WN4100Southwest Airlines · STL → MIA
live · 3m ago
Route confirmed Southwest Airlines

WN4100 St LouisSTL · 14:25 MiamiMIA · 18:00

WN4100 by Southwest Airlines flies from St Louis (STL) to Miami (MIA).

Right nowNext departure tomorrow Operates daily
06:10

scheduled from STL

Wins back in air~28 minmedian gate push vs arrival · how planes make up time →

The route today

live boards
STLSt LouisOn-time likelySTL delay board →
MIAMiamiOn-time likelyMIA delay board →
STL→MIAevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
35%Chance of 15+ min delay
1.6%Chance of cancellation
+7 minTypical airport delay in this weather

Conditions at STL and MIA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow at St Louis

Forecast

Thu 12 Nov, local date

High11°Clikely 9°C to 13°C
Low6°Clikely 4°C to 8°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at MIA

Forecast

Thu 12 Nov, local date

High29°Clikely 27°C to 30°C
Low23°Clikely 21°C to 24°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other St Louis to Miami flights today

same route · Southwest Airlines
WN4888departs 11:40
WN3733departs 17:05
WN2630departs 18:15
WN4756departs 18:35

If WN4100 is cancelled, these are the other Southwest Airlines nonstop flights from St Louis to Miami on the same day, with scheduled departure times in STL local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How WN4100 actually runs

Pro Flight Search has tracked every published board update for WN4100 across the STL and MIA boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 2 completed legs so far: landed +16 min. Not enough to call it.

The verdict above is that record speaking, so it reflects how WN4100 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
10-30STL 14:25 15:13 (+48)MIA 18:00 18:23 (+23)
10-29STL 14:25 15:04 (+39)MIA 18:00 18:09 (+9)

Aircraft

Recent tails: N8665D, N8694E, N9017L.

Board clocks recorded as STL and MIA published them.

Planning around WN4100? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: WN4100 St Louis to Miami on-time performance, measured from the STL and MIA airport boards.

Canonical URL
https://proflightsearch.com/flight/WN4100
How we measure this →