How often is WN4256 on time?

Across 27 flights on COS → PHX from 2026-06-04 to 2026-06-30, WN4256 arrived within 15 minutes of schedule 93% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +12 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

• WN4256 on MSP → DEN (49 flights)
• WN4256 on SAT → DEN (11 flights)
• WN4256 on MCI → AUS (5 flights)
• WN4256 on CHS → DAL (13 flights)
• WN4256 on RSW → STL (1 flights)
• WN4256 on HOU → ABQ (1 flights)
• WN4256 on DAL → SLC (2 flights)
• WN4256 on BUF → TPA (1 flights)
• WN4256 on STL → PHX (22 flights)
• WN4256 on BWI → MYR (7 flights)
• WN4256 on LAS → BWI (7 flights)
• WN4256 on BNA → DEN (8 flights)
• WN4256 on PHX → OAK (25 flights)
• WN4256 on MCO → BDL (10 flights)

Related

• All Southwest Airlines flights on COS → PHX
• Compare airlines on COS → PHX
• Southwest Airlines on the return, PHX → COS