WN1397 PHL → STL

Southwest Airlines · Philadelphia, PA to St. Louis, MO · 47 flights observed, 2026-01-06 to 2026-03-04 · 814 mi

This flight's reliability varies a lot by day of week — 100% on-time on Tuesdays vs. 43% on Mondays.

WN1397 covers more than one route in the data window — the stats below are for PHL → STL, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
89%
Median delay
-14 min
90th percentile
+17 min
Cancellation rate
4%

How often is WN1397 on time?

Across 47 flights on PHL → STL from 2026-01-06 to 2026-03-04, WN1397 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +17 min or later. 4% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time4089%
16-30 min37%
31-60 min12%
61-120 min12%
2+ hrs00%

Performance by month

MonthFlightsOn-timeAvg delay
2026-012588%-9 min
2026-021794%-11 min
2026-03367%+2 min

Performance by day of week

DayFlightsOn-time
Mon743%
Tue9100%
Wed9100%
Thu6100%
Fri5100%
Sat475%
Sun5100%

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