Southwest Airlines
WN3909St. Louis to Denver
Southwest Airlines flight WN3909 flies from St. Louis (STL) to Denver (DEN), 1,236 km. Over August 2025 to July 2026 it usually arrives about 10 minutes late: 72% of 185 flights arrived within 15 minutes of schedule and 0.5% were cancelled (US Department of Transportation data).
On-time record, last 12 months
72%
on time (within 15 min)
16%
more than 30 min late
0.5%
cancelled
+10 min
average arrival vs schedule
Every operation of WN3909, August 2025 to July 2026: 185 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as WN3909
- St. Louis (STL) to Denver (DEN)58 flights
- Oklahoma City (OKC) to Washington (DCA)50 flights
- Dallas Love Field (DAL) to Orlando (MCO)31 flights
- Oakland (OAK) to Dallas Love Field (DAL)13 flights
- Denver (DEN) to Spokane (GEG)13 flights
- Las Vegas (LAS) to San Francisco (SFO)8 flights
- Austin Bergstrom (AUS) to Dallas Love Field (DAL)6 flights
- Houston (HOU) to Orlando (MCO)4 flights
- Orlando (MCO) to Kansas City (MCI)1 flights
- San Antonio (SAT) to Oklahoma City (OKC)1 flights
Other flights from St. Louis to Denver
More about St. Louis (STL) and Denver (DEN).
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