WN3874 Salt Lake CitySLC · 06:20 DenverDEN · 07:45
WN3874 by Southwest Airlines flies from Salt Lake City (SLC) to Denver (DEN).
scheduled from SLC
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 −2 min · 0 cancelled · 8 operations tracked
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by DEN (Denver), currently flying LIFR (low instrument). 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
ForecastSalt Lake City to Denver with Southwest Airlines · Sun 1 Nov, local date
- Chance a departure leaves 60+ min late
- 15%1.6× usual
Forecast weather: 97% chance of rain at Salt Lake City
No cancellation outlook here: this airport's board does not publish cancellations reliably.
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · About 6 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 Salt Lake City to Denver flights today
same route · Southwest AirlinesIf WN3874 is cancelled, these are the other Southwest Airlines nonstop flights from Salt Lake City to Denver on the same day, with scheduled departure times in SLC 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 WN3874 actually runs
Pro Flight Search has tracked every published board update for WN3874 across the SLC and DEN boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 8 confirmed landings · 6/8 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how WN3874 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: N8776L, N8988S, N294WN, N8651A.
Board clocks recorded as SLC and DEN published them.
Planning around WN3874? 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: WN3874 Salt Lake City to Denver on-time performance, measured from the SLC and DEN airport boards.
https://proflightsearch.com/flight/WN3874
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