STL → SMF Southwest Airlines

Southwest Airlines · St. Louis, MO to Sacramento, CA · 331 flights, 2025-07-01 to 2026-06-30 · aggregated across 16 flight numbers

This route runs much more reliably at some times of day than others — 97% on-time departing 9am–12pm vs. 57% departing 6–9pm.
On-time arrival
80%
Median delay
0 min
90th percentile
+29 min
Cancellation rate
0%

How on-time is Southwest Airlines from STL to SMF?

Across every Southwest Airlines flight number on STL → SMF (331 flights, 2025-07-01 to 2026-06-30), 80% arrived within 15 minutes of schedule. Median arrival delay 0 min; the worst 10% ran +29 min or later. 0% were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time26580%
16-30 min3410%
31-60 min165%
61-120 min134%
2+ hrs31%

Performance by month

MonthFlightsOn-timeAvg delay
2025-073184%+10 min
2025-083187%-1 min
2025-093097%-3 min
2025-103161%+16 min
2025-112976%+4 min
2025-123165%+22 min
2026-011070%+7 min
2026-021889%+8 min
2026-032979%+6 min
2026-043087%+2 min
2026-053187%-6 min
2026-063077%+7 min

Performance by day of week

DayFlightsOn-time
Mon4976%
Tue4591%
Wed4379%
Thu4888%
Fri4986%
Sat4774%
Sun5068%

Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…