Flight OddsWN4855 SJC → ONT
Southwest Airlines · San Jose, CA to Ontario, CA · 18 flights observed, 2025-11-22 to 2026-01-04 · 333 mi
WN4855 covers more than one route in the data window — the stats below are for SJC → ONT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
56%
Median delay
+10 min
90th percentile
+57 min
Cancellation rate
0%
How often is WN4855 on time?
Across 18 flights on SJC → ONT from 2025-11-22 to 2026-01-04, WN4855 arrived within 15 minutes of schedule 56% of the time. The median arrival delay was +10 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 | 10 | 56% |
| 16-30 min | 3 | 17% |
| 31-60 min | 3 | 17% |
| 61-120 min | 1 | 6% |
| 2+ hrs | 1 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 4 | 50% | +35 min |
| 2025-12 | 11 | 55% | +13 min |
| 2026-01 | 3 | 67% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 100% |
| Tue | 3 | 33% |
| Wed | 1 | 100% |
| Thu | No data | — |
| Fri | 3 | 33% |
| Sat | 5 | 40% |
| Sun | 3 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…