Flight OddsSouthwest Airlines · San Diego, CA to San Francisco, CA · 42 flights observed, 2025-11-02 to 2026-01-05 · 447 mi
WN4252 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 WN4252 on time?
Across 42 flights on SAN → SFO from 2025-11-02 to 2026-01-05, WN4252 arrived within 15 minutes of schedule 59% of the time. The median arrival delay was +4 min, and the worst 10% of flights arrived +86 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 24 | 59% |
| 16-30 min | 3 | 7% |
| 31-60 min | 8 | 20% |
| 61-120 min | 3 | 7% |
| 2+ hrs | 3 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 22 | 55% | +22 min |
| 2025-12 | 18 | 67% | +24 min |
| 2026-01 | 1 | 0% | +114 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 50% |
| Tue | 6 | 83% |
| Wed | 8 | 63% |
| Thu | 8 | 38% |
| Fri | 6 | 83% |
| Sat | No data | — |
| Sun | 7 | 43% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…