How often is WN420 on time?

Across 24 flights on STL → PHL from 2025-11-03 to 2026-01-01, WN420 arrived within 15 minutes of schedule 100% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived -7 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

• WN420 on BDL → BWI (23 flights)
• WN420 on BHM → HOU (4 flights)
• WN420 on DEN → DAL (39 flights)
• WN420 on DAL → MSY (8 flights)
• WN420 on BNA → LAS (33 flights)
• WN420 on MCO → DCA (58 flights)
• WN420 on TUL → DEN (36 flights)
• WN420 on BNA → TUL (19 flights)
• WN420 on SJC → BNA (5 flights)
• WN420 on SNA → SJC (5 flights)
• WN420 on AUS → OKC (1 flights)
• WN420 on OKC → DEN (1 flights)
• WN420 on MCO → MKE (9 flights)
• WN420 on BWI → STL (9 flights)
• WN420 on PWM → BWI (13 flights)
• WN420 on AUS → MCO (42 flights)
• WN420 on CMH → STL (7 flights)
• WN420 on SAT → DEN (1 flights)
• WN420 on ATL → MCO (34 flights)
• WN420 on AUS → BOS (1 flights)

Related

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