How often is WN4015 on time?

Across 40 flights on STL → SFO from 2025-08-07 to 2025-09-29, WN4015 arrived within 15 minutes of schedule 79% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +21 min or later. 3% 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

• WN4015 on TPA → DAL (20 flights)
• WN4015 on MCI → STL (57 flights)
• WN4015 on DCA → MCI (8 flights)
• WN4015 on MCO → MDW (33 flights)
• WN4015 on MDW → PVD (15 flights)
• WN4015 on MDW → LGA (5 flights)
• WN4015 on TUS → LAX (3 flights)
• WN4015 on HOU → BNA (1 flights)
• WN4015 on BNA → MCO (1 flights)
• WN4015 on PDX → LAS (59 flights)
• WN4015 on OAK → PHX (19 flights)
• WN4015 on PHX → MSY (13 flights)
• WN4015 on PHL → MDW (1 flights)
• WN4015 on MSY → MCO (30 flights)
• WN4015 on SAT → MSY (1 flights)

Related

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