Flight OddsUA540 DEN → SAN
United Airlines · Denver, CO to San Diego, CA · 364 flights observed, 2025-07-01 to 2026-06-30 · 853 mi
UA540 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
66%
Median delay
+2 min
90th percentile
+61 min
Cancellation rate
1%
How often is UA540 on time?
Across 364 flights on DEN → SAN from 2025-07-01 to 2026-06-30, UA540 arrived within 15 minutes of schedule 66% of the time. The median arrival delay was +2 min, and the worst 10% of flights arrived +61 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 238 | 66% |
| 16-30 min | 40 | 11% |
| 31-60 min | 46 | 13% |
| 61-120 min | 24 | 7% |
| 2+ hrs | 13 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 47% | +34 min |
| 2025-08 | 31 | 52% | +24 min |
| 2025-09 | 29 | 69% | +11 min |
| 2025-10 | 30 | 67% | +12 min |
| 2025-11 | 29 | 79% | +4 min |
| 2025-12 | 31 | 55% | +34 min |
| 2026-01 | 31 | 68% | +20 min |
| 2026-02 | 28 | 82% | -3 min |
| 2026-03 | 31 | 71% | +13 min |
| 2026-04 | 30 | 90% | +1 min |
| 2026-05 | 31 | 68% | +15 min |
| 2026-06 | 30 | 47% | +27 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 52 | 62% |
| Tue | 52 | 71% |
| Wed | 51 | 73% |
| Thu | 51 | 65% |
| Fri | 51 | 69% |
| Sat | 52 | 71% |
| Sun | 52 | 52% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…