WN4576 San DiegoSAN · 13:25 St LouisSTL · 19:05
WN4576 by Southwest Airlines flies from San Diego (SAN) to St Louis (STL) for the Thu, Oct 29 departure.
arrived at STL · 37 min late
Where the minutes go
last 5 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival +31 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SAN and STL 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
ForecastSan Diego to St Louis with Southwest Airlines · Fri 30 Oct, local date
- Chance a departure is cancelled
- 0.2%1.6× usual
- Chance a departure leaves 60+ min late
- 24%0.9× usual
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 1 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 San Diego to St Louis flights today
same route · Southwest AirlinesIf WN4576 is cancelled, these are the other Southwest Airlines nonstop flights from San Diego to St Louis on the same day, with scheduled departure times in SAN 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 WN4576 actually runs
Pro Flight Search has tracked every published board update for WN4576 across the SAN and STL boards: schedule changes, gate pushes and actual clocks. Usually lands ~31 min late. Based on 5 confirmed landings · 1/5 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how WN4576 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: N8540V, N8860S, N8815L, N8832H.
Board clocks recorded as SAN and STL published them.
Planning around WN4576? 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: WN4576 San Diego to St Louis on-time performance, measured from the SAN and STL airport boards.
https://proflightsearch.com/flight/WN4576
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