WN4971 DenverDEN · 18:00 PhiladelphiaPHL · 00:40
WN4971 by Southwest Airlines flies from Denver (DEN) to Philadelphia (PHL) for the Fri, Sep 18 departure.
en route from DEN to PHL
board checked 61m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 21:22 · typical taxi-out at DEN ≈ 7 min. No receiver coverage over open ocean.
Where the minutes go
last 7 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 −11 min · 0 cancelled · 10 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at DEN and PHL 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 Denver to Philadelphia flights today
same route · Southwest AirlinesIf WN4971 is cancelled, these are the other Southwest Airlines nonstop flights from Denver to Philadelphia on the same day, with scheduled departure times in DEN local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN4971 actually runs
Pro Flight Search has tracked every published board update for WN4971 across the DEN and PHL boards: schedule changes, gate pushes and actual clocks. Usually lands ~11 min early. Based on 1 confirmed landing · 1/1 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how WN4971 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: N8722L, N8626B, N7742B, N277WN.
Board clocks recorded as DEN and PHL published them.
Planning around WN4971? 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 — WN4971 Denver to Philadelphia on-time performance, measured from the DEN and PHL airport boards.
https://proflightsearch.com/flight/WN4971
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