WN4639 HoustonHOU · 18:35 TampaTPA
WN4639 by Southwest Airlines flies from Houston (HOU) to Tampa (TPA) for the Wed, Nov 4 departure.
departs HOU · on schedule
board checked 13m ago · checking again in 45s
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 HOU and TPA 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 Houston
ForecastThu 5 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 Tampa
ForecastThu 5 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 Houston to Tampa flights today
same route · Southwest AirlinesIf WN4639 is cancelled, these are the other Southwest Airlines nonstop flights from Houston to Tampa on the same day, with scheduled departure times in HOU 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 WN4639 actually runs
Pro Flight Search has tracked every published board update for WN4639 across the HOU and TPA boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 3 completed legs so far: departed +13 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN4639 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as HOU and TPA published them.
Planning around WN4639? 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: WN4639 Houston to Tampa on-time performance, measured from the HOU and TPA airport boards.
https://proflightsearch.com/flight/WN4639
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