WN1603 PhoenixPHX · 18:55 St LouisSTL · 23:55
WN1603 by Southwest Airlines flies from Phoenix (PHX) to St Louis (STL) for the Fri, Sep 11 departure.
departs PHX · 49 min late
board checked 19m ago · checking again in 45s
Where the minutes go
last 4 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 PHX and STL are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, 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 →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Phoenix to St Louis flights today
same route · Southwest AirlinesIf WN1603 is cancelled, these are the other Southwest Airlines nonstop flights from Phoenix to St Louis on the same day, with scheduled departure times in PHX local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN1603 actually runs
Pro Flight Search has tracked every published board update for WN1603 across the PHX and STL boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: left a little late (~17 min) but landed about 9 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN1603 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: N8518R, N8531Q.
Board clocks recorded as PHX and STL published them.
Planning around WN1603? 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 — WN1603 Phoenix to St Louis on-time performance, measured from the PHX and STL airport boards.
https://proflightsearch.com/flight/WN1603
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