STS → SAN Southwest Airlines

Southwest Airlines · Santa Rosa, CA to San Diego, CA · 132 flights, 2026-04-08 to 2026-06-30 · aggregated across 4 flight numbers

This route runs much more reliably at some times of day than others — 96% on-time departing 6–9am vs. 56% departing 3–6pm.
On-time arrival
82%
Median delay
-9 min
90th percentile
+38 min
Cancellation rate
0%

How on-time is Southwest Airlines from STS to SAN?

Across every Southwest Airlines flight number on STS → SAN (132 flights, 2026-04-08 to 2026-06-30), 82% arrived within 15 minutes of schedule. Median arrival delay -9 min; the worst 10% ran +38 min or later. 0% were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time10882%
16-30 min97%
31-60 min75%
61-120 min54%
2+ hrs32%

Performance by month

MonthFlightsOn-timeAvg delay
2026-043678%+12 min
2026-054992%-8 min
2026-064774%+10 min

Performance by day of week

DayFlightsOn-time
Mon2475%
Tue12100%
Wed1292%
Thu2483%
Fri2467%
Sat12100%
Sun2479%

WN flight numbers on STS → SAN

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