How often is WN3909 on time?

Across 27 flights on STL → DEN from 2026-06-04 to 2026-06-30, WN3909 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +14 min or later. 0% of flights were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

Performance by month

Performance by day of week

Other routes

• WN3909 on HOU → MCO (4 flights)
• WN3909 on MCO → MCI (1 flights)
• WN3909 on LAS → SFO (8 flights)
• WN3909 on DAL → MCO (31 flights)
• WN3909 on DEN → GEG (13 flights)
• WN3909 on AUS → DAL (6 flights)
• WN3909 on OAK → DAL (13 flights)
• WN3909 on OKC → DCA (50 flights)
• WN3909 on SAT → OKC (1 flights)
• WN3909 on LAS → FAT (1 flights)

Related

• All Southwest Airlines flights on STL → DEN
• Compare airlines on STL → DEN
• Southwest Airlines on the return, DEN → STL