Flight OddsSouthwest Airlines · San Francisco, CA to San Diego, CA · 59 flights observed, 2025-11-02 to 2026-01-05 · 447 mi
WN4310 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 WN4310 on time?
Across 59 flights on SFO → SAN from 2025-11-02 to 2026-01-05, WN4310 arrived within 15 minutes of schedule 37% of the time. The median arrival delay was +33 min, and the worst 10% of flights arrived +107 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 21 | 37% |
| 16-30 min | 7 | 12% |
| 31-60 min | 14 | 25% |
| 61-120 min | 10 | 18% |
| 2+ hrs | 5 | 9% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 24 | 42% | +35 min |
| 2025-12 | 29 | 38% | +42 min |
| 2026-01 | 4 | 0% | +139 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 9 | 44% |
| Tue | 9 | 78% |
| Wed | 8 | 38% |
| Thu | 8 | 25% |
| Fri | 9 | 44% |
| Sat | 4 | 0% |
| Sun | 10 | 10% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…