Flight OddsUA2309 DEN → SAN
United Airlines · Denver, CO to San Diego, CA · 343 flights observed, 2025-07-01 to 2026-06-30 · 853 mi
UA2309 covers more than one route in the data window — the stats below are for DEN → SAN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
90%
Median delay
-13 min
90th percentile
+10 min
Cancellation rate
0%
How often is UA2309 on time?
Across 343 flights on DEN → SAN from 2025-07-01 to 2026-06-30, UA2309 arrived within 15 minutes of schedule 90% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +10 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 | 308 | 90% |
| 16-30 min | 18 | 5% |
| 31-60 min | 7 | 2% |
| 61-120 min | 5 | 1% |
| 2+ hrs | 3 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 90% | -8 min |
| 2025-08 | 31 | 77% | +2 min |
| 2025-09 | 30 | 87% | -2 min |
| 2025-10 | 31 | 100% | -12 min |
| 2025-11 | 28 | 86% | -8 min |
| 2025-12 | 31 | 87% | -6 min |
| 2026-01 | 30 | 90% | -17 min |
| 2026-02 | 11 | 91% | -12 min |
| 2026-03 | 27 | 96% | -15 min |
| 2026-04 | 30 | 100% | -14 min |
| 2026-05 | 31 | 97% | -12 min |
| 2026-06 | 30 | 83% | +1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 48 | 94% |
| Tue | 50 | 96% |
| Wed | 49 | 92% |
| Thu | 48 | 88% |
| Fri | 48 | 85% |
| Sat | 49 | 90% |
| Sun | 49 | 88% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…