Flight Reliability
WN 4989 · Southwest Airlines
San Diego → Oakland (SAN–OAK)82% of its flights flew this route. The rest (OAK–DEN, PHX–ELP) are included in these numbers.
- 90%
- Arrive within 15 minutes
- 13 min early
- Average arrival delay
- 0%
- Cancelled
- 17 min early
- Median arrival delay
Based on 71 historical flights. Data through May 2026.
What the data says
12–3 PM has a slight edge.
Departures between 12–3 PM arrived on time 96% of the time, against 92% between 9 AM–12 PM.
Thursdays have been rough.
WN 4989 arrived on time 100% of the time on Fridays and just 60% on Thursdays. That gap is worth planning around.
Better than the SAN–OAK route average.
WN 4989 arrived on time 90% of the time, versus 76% across the SAN–OAK route.
Better than the Southwest Airlines network average.
WN 4989 arrived on time 90% of the time, versus 78% across the Southwest Airlines network.
The breakdown
- Mon—(9 flights)
- Tue—(9 flights)
- Wed—(9 flights)
- Thu60%(10 flights)
- Fri100%(11 flights)
- Sat—(8 flights)
- Sun80%(15 flights)
- 6–9 AM92%(26 flights)
- 9 AM–12 PM92%(13 flights)
- 12–3 PM96%(28 flights)
- 9 PM–12 AM—(4 flights)
- Departures on time
- 86%
- Diverted
- 0%
- Flights flown
- 71
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 71 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.