WN2399 STL → PHX

Southwest Airlines · St. Louis, MO to Phoenix, AZ · 50 flights observed, 2026-04-07 to 2026-06-03 · 1,262 mi

This flight's reliability varies a lot by day of week — 78% on-time on Tuesdays vs. 25% on Thursdays.

WN2399 covers more than one route in the data window — the stats below are for STL → PHX, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
52%
Median delay
+15 min
90th percentile
+87 min
Cancellation rate
0%

How often is WN2399 on time?

Across 50 flights on STL → PHX from 2026-04-07 to 2026-06-03, WN2399 arrived within 15 minutes of schedule 52% of the time. The median arrival delay was +15 min, and the worst 10% of flights arrived +87 min or later. 0% of flights were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time2652%
16-30 min816%
31-60 min612%
61-120 min816%
2+ hrs24%

Performance by month

MonthFlightsOn-timeAvg delay
2026-042162%+15 min
2026-052638%+39 min
2026-063100%+0 min

Performance by day of week

DayFlightsOn-time
Mon838%
Tue978%
Wed967%
Thu825%
Fri875%
SatNo data—
Sun825%

Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…