How often is WN857 on time?

Across 18 flights on LAS → STL from 2026-04-07 to 2026-06-03, WN857 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +20 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

• WN857 on BWI → ALB (27 flights)
• WN857 on ATL → DAL (32 flights)
• WN857 on DAL → ELP (24 flights)
• WN857 on MDW → BWI (8 flights)
• WN857 on PHX → LAS (33 flights)
• WN857 on LAS → FLL (5 flights)
• WN857 on DEN → SMF (47 flights)
• WN857 on LGB → DEN (8 flights)
• WN857 on OKC → STL (8 flights)
• WN857 on SMF → LGB (11 flights)
• WN857 on STL → DCA (8 flights)
• WN857 on DEN → OKC (8 flights)
• WN857 on MSY → DCA (36 flights)
• WN857 on HOU → MSY (21 flights)
• WN857 on MSY → BWI (4 flights)
• WN857 on MDW → ATL (1 flights)
• WN857 on BWI → ROC (18 flights)
• WN857 on ROC → MDW (9 flights)
• WN857 on HOU → GSP (14 flights)
• WN857 on GSP → BWI (13 flights)
• WN857 on MSP → BWI (58 flights)
• WN857 on BNA → DTW (29 flights)
• WN857 on DTW → MDW (24 flights)
• WN857 on DEN → DTW (5 flights)

Related

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