How often is WN4128 on time?

Across 17 flights on PHX → SLC from 2025-11-02 to 2026-01-05, WN4128 arrived within 15 minutes of schedule 100% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived -9 min or later. 18% 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

• WN4128 on DAL → ATL (7 flights)
• WN4128 on LAX → DAL (23 flights)
• WN4128 on DAL → OKC (16 flights)
• WN4128 on PHX → MDW (57 flights)
• WN4128 on SLC → LGB (18 flights)
• WN4128 on DEN → SLC (18 flights)
• WN4128 on LGB → PHX (18 flights)
• WN4128 on MDW → CLT (8 flights)
• WN4128 on MDW → DCA (8 flights)
• WN4128 on ONT → BWI (32 flights)
• WN4128 on DTW → MCO (3 flights)
• WN4128 on PHX → SMF (1 flights)
• WN4128 on LAS → PHX (13 flights)
• WN4128 on PHX → HOU (1 flights)
• WN4128 on SLC → DEN (1 flights)
• WN4128 on PHX → AUS (19 flights)
• WN4128 on AUS → DAL (1 flights)
• WN4128 on PDX → PHX (21 flights)
• WN4128 on PHX → ABQ (12 flights)
• WN4128 on SFO → PHX (4 flights)
• WN4128 on BWI → PVD (57 flights)
• WN4128 on OMA → STL (21 flights)
• WN4128 on DEN → OMA (10 flights)

Related

• All Southwest Airlines flights on PHX → SLC
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• Southwest Airlines on the return, SLC → PHX