Flight OddsSouthwest Airlines · San Diego, CA to San Francisco, CA · 31 flights observed, 2025-10-02 to 2025-11-01 · 447 mi
WN4387 covers more than one route in the data window — the stats below are for SAN → SFO, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN4387 on time?
Across 31 flights on SAN → SFO from 2025-10-02 to 2025-11-01, WN4387 arrived within 15 minutes of schedule 58% of the time. The median arrival delay was +12 min, and the worst 10% of flights arrived +72 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 | 18 | 58% |
| 16-30 min | 5 | 16% |
| 31-60 min | 4 | 13% |
| 61-120 min | 1 | 3% |
| 2+ hrs | 3 | 10% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 30 | 57% | +28 min |
| 2025-11 | 1 | 100% | -17 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 25% |
| Tue | 4 | 75% |
| Wed | 4 | 100% |
| Thu | 5 | 20% |
| Fri | 5 | 40% |
| Sat | 5 | 100% |
| Sun | 4 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…