Flight OddsSouthwest Airlines · San Diego, CA to San Francisco, CA · 57 flights observed, 2025-11-02 to 2026-01-05 · 447 mi
WN4253 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 WN4253 on time?
Across 57 flights on SAN → SFO from 2025-11-02 to 2026-01-05, WN4253 arrived within 15 minutes of schedule 50% of the time. The median arrival delay was +16 min, and the worst 10% of flights arrived +108 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 | 28 | 50% |
| 16-30 min | 3 | 5% |
| 31-60 min | 11 | 20% |
| 61-120 min | 10 | 18% |
| 2+ hrs | 4 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 25 | 56% | +25 min |
| 2025-12 | 27 | 52% | +32 min |
| 2026-01 | 4 | 0% | +102 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 10 | 30% |
| Tue | 9 | 56% |
| Wed | 7 | 57% |
| Thu | 8 | 50% |
| Fri | 9 | 56% |
| Sat | 4 | 75% |
| Sun | 9 | 44% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…