Flight OddsSouthwest Airlines · San Francisco, CA to San Diego, CA · 58 flights observed, 2025-08-05 to 2025-10-01 · 447 mi
WN4012 covers more than one route in the data window — the stats below are for SFO → SAN, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN4012 on time?
Across 58 flights on SFO → SAN from 2025-08-05 to 2025-10-01, WN4012 arrived within 15 minutes of schedule 71% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +68 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 41 | 71% |
| 16-30 min | 5 | 9% |
| 31-60 min | 5 | 9% |
| 61-120 min | 6 | 10% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 27 | 74% | +9 min |
| 2025-09 | 30 | 67% | +19 min |
| 2025-10 | 1 | 100% | -9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 50% |
| Tue | 9 | 89% |
| Wed | 9 | 100% |
| Thu | 8 | 38% |
| Fri | 8 | 38% |
| Sat | 8 | 88% |
| Sun | 8 | 88% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…