WN1637 DenverDEN · 13:35 TucsonTUS · 14:30
WN1637 by Southwest Airlines flies from Denver (DEN) to Tucson (TUS).
Same number through DEN → LAS → TUS
scheduled from DEN
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at DEN and TUS 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 Denver
ForecastTue 3 Nov, local date
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 Las Vegas
ForecastTue 3 Nov, local date
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 departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Denver to Tucson flights today
same route · Southwest AirlinesIf WN1637 is cancelled, these are the other Southwest Airlines nonstop flights from Denver to Tucson on the same day, with scheduled departure times in DEN 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 WN1637 actually runs
Pro Flight Search has tracked every published board update for WN1637 across the DEN and TUS boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 1 completed leg so far: left heavily delayed (~118 min) but landed about 8 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN1637 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: N8988S, N8677A.
Board clocks recorded as DEN and TUS published them.
Planning around WN1637? 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: WN1637 Denver to Tucson on-time performance, measured from the DEN and TUS airport boards.
https://proflightsearch.com/flight/WN1637
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