How often is WN4312 on time?

Across 23 flights on STL → DEN from 2026-06-04 to 2026-06-30, WN4312 arrived within 15 minutes of schedule 61% of the time. The median arrival delay was +7 min, and the worst 10% of flights arrived +52 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

• WN4312 on SLC → SMF (49 flights)
• WN4312 on RDU → STL (33 flights)
• WN4312 on OMA → LAS (11 flights)
• WN4312 on PHX → MSY (1 flights)
• WN4312 on LGA → MDW (16 flights)
• WN4312 on DCA → DAL (18 flights)
• WN4312 on PIT → STL (19 flights)
• WN4312 on STL → PHX (1 flights)
• WN4312 on TPA → HOU (40 flights)
• WN4312 on ROC → TPA (8 flights)
• WN4312 on SAN → DEN (10 flights)
• WN4312 on DEN → OKC (5 flights)
• WN4312 on LAS → SAN (5 flights)

Related

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