WN3918 TPA → STL

Southwest Airlines · Tampa, FL to St. Louis, MO · 15 flights observed, 2026-04-11 to 2026-05-31 · 869 mi

This flight runs much more reliably at some times of day than others — 100% on-time departing 12–3pm vs. 43% departing 9pm–12am.

WN3918 covers more than one route in the data window — the stats below are for TPA → STL, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
71%
Median delay
-9 min
90th percentile
+31 min
Cancellation rate
7%

How often is WN3918 on time?

Across 15 flights on TPA → STL from 2026-04-11 to 2026-05-31, WN3918 arrived within 15 minutes of schedule 71% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +31 min or later. 7% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time1071%
16-30 min214%
31-60 min17%
61-120 min17%
2+ hrs00%

Performance by month

MonthFlightsOn-timeAvg delay
2026-04683%-5 min
2026-05863%+9 min

Performance by day of week

DayFlightsOn-time
MonNo data—
TueNo data—
WedNo data—
ThuNo data—
FriNo data—
Sat7100%
Sun743%

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