WN437 St LouisSTL · 12:10 PhoenixPHX · 13:30
WN437 by Southwest Airlines flies from St Louis (STL) to Phoenix (PHX).
scheduled from STL
Where the minutes go
last 3 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at STL and PHX 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 on this route
ForecastSt Louis to Phoenix with Southwest Airlines · Sat 31 Oct, local date
- Chance a departure is cancelled
- 0.2%6.1× usual
- Chance a departure leaves 60+ min late
- 12%1.2× usual
Forecast weather: 84% chance of rain at Phoenix
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 5 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other St Louis to Phoenix flights today
same route · Southwest AirlinesIf WN437 is cancelled, these are the other Southwest Airlines nonstop flights from St Louis to Phoenix 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 WN437 actually runs
Pro Flight Search has tracked every published board update for WN437 across the STL and PHX boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 3 completed legs so far: left a little late (~15 min) but landed about 15 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN437 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N8777Q, N8662F.
Board clocks recorded as STL and PHX published them.
Planning around WN437? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search: WN437 St Louis to Phoenix on-time performance, measured from the STL and PHX airport boards.
https://proflightsearch.com/flight/WN437
.