Flight Reliability
WN 388 · Southwest Airlines
San Diego → STS (SAN–STS)
100
Nerd Approved
WanderNerd Reliability Score
- 93%
- Arrive within 15 minutes
- 12 min early
- Average arrival delay
- 0%
- Cancelled
- 16 min early
- Median arrival delay
Based on 30 historical flights. Data through May 2026.
What the data says
Well ahead of the SAN–STS route.
WN 388 arrived on time 93% of the time, versus 78% across the SAN–STS route.
Well ahead of the Southwest Airlines network.
WN 388 arrived on time 93% of the time, versus 78% across the Southwest Airlines network.
The breakdown
- Mon—(7 flights)
- Tue—(0 flights)
- Wed—(0 flights)
- Thu—(8 flights)
- Fri—(8 flights)
- Sat—(0 flights)
- Sun—(7 flights)
- 6–9 AM91%(23 flights)
- 9 AM–12 PM—(7 flights)
- Departures on time
- 93%
- Diverted
- 0%
- Flights flown
- 30
- Months covered
- 2
Same route, other flights
Keep nerding
Based on 30 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.