How often is WN4578 on time?

Across 19 flights on SMF → SNA from 2025-07-03 to 2025-08-04, WN4578 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +16 min or later. 5% 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

• WN4578 on BWI → TPA (23 flights)
• WN4578 on ABQ → DEN (7 flights)
• WN4578 on STL → BOS (1 flights)
• WN4578 on LAS → PSP (5 flights)
• WN4578 on LAS → BOI (1 flights)
• WN4578 on LAS → RNO (1 flights)
• WN4578 on FLL → DAL (1 flights)
• WN4578 on LAS → BNA (1 flights)
• WN4578 on DEN → TPA (18 flights)
• WN4578 on MDW → CLE (1 flights)
• WN4578 on RDU → DEN (1 flights)

Related

• All Southwest Airlines flights on SMF → SNA
• Compare airlines on SMF → SNA
• Southwest Airlines on the return, SNA → SMF