Flight OddsWN4399 TUS → SAN
Southwest Airlines · Tucson, AZ to San Diego, CA · 25 flights observed, 2025-10-02 to 2025-10-30 · 367 mi
WN4399 covers more than one route in the data window — the stats below are for TUS → SAN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
56%
Median delay
+15 min
90th percentile
+57 min
Cancellation rate
0%
How often is WN4399 on time?
Across 25 flights on TUS → SAN from 2025-10-02 to 2025-10-30, WN4399 arrived within 15 minutes of schedule 56% of the time. The median arrival delay was +15 min, and the worst 10% of flights arrived +57 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 | 14 | 56% |
| 16-30 min | 1 | 4% |
| 31-60 min | 8 | 32% |
| 61-120 min | 1 | 4% |
| 2+ hrs | 1 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 25 | 56% | +28 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 25% |
| Tue | 4 | 75% |
| Wed | 4 | 100% |
| Thu | 5 | 80% |
| Fri | 4 | 25% |
| Sat | No data | — |
| Sun | 4 | 25% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…