WN4135 SAN → SMF

Southwest Airlines · San Diego, CA to Sacramento, CA · 49 flights observed, 2026-04-07 to 2026-06-03 · 480 mi

This flight has been on time less than half the time (43%) — expect a real chance of a delay.

WN4135 covers more than one route in the data window — the stats below are for SAN → SMF, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
43%
Median delay
+20 min
90th percentile
+62 min
Cancellation rate
0%

How often is WN4135 on time?

Across 49 flights on SAN → SMF from 2026-04-07 to 2026-06-03, WN4135 arrived within 15 minutes of schedule 43% of the time. The median arrival delay was +20 min, and the worst 10% of flights arrived +62 min or later. 0% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time2143%
16-30 min1429%
31-60 min816%
61-120 min510%
2+ hrs12%

Performance by month

MonthFlightsOn-timeAvg delay
2026-042143%+23 min
2026-052540%+26 min
2026-06367%+8 min

Performance by day of week

DayFlightsOn-time
Mon838%
Tue967%
Wed933%
Thu850%
Fri825%
SatNo data—
Sun743%

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