UA1236 DEN → PHX
United Airlines · Denver, CO to Phoenix, AZ · 223 flights observed, 2025-07-01 to 2026-06-29 · 602 mi
UA1236 covers more than one route in the data window — the stats below are for DEN → PHX, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
67%
Median delay
-3 min
90th percentile
+71 min
Cancellation rate
0%
How often is UA1236 on time?
Across 223 flights on DEN → PHX from 2025-07-01 to 2026-06-29, UA1236 arrived within 15 minutes of schedule 67% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +71 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 | 149 | 67% |
| 16-30 min | 31 | 14% |
| 31-60 min | 14 | 6% |
| 61-120 min | 17 | 8% |
| 2+ hrs | 11 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 41% | +59 min |
| 2025-08 | 26 | 50% | +35 min |
| 2025-09 | 21 | 62% | +17 min |
| 2025-10 | 19 | 84% | +3 min |
| 2025-12 | 22 | 77% | -2 min |
| 2026-01 | 20 | 80% | -2 min |
| 2026-02 | 17 | 82% | +4 min |
| 2026-03 | 23 | 78% | -1 min |
| 2026-04 | 17 | 94% | -11 min |
| 2026-05 | 7 | 57% | +38 min |
| 2026-06 | 21 | 48% | +37 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 32 | 53% |
| Tue | 9 | 56% |
| Wed | 41 | 73% |
| Thu | 44 | 68% |
| Fri | 42 | 67% |
| Sat | 14 | 71% |
| Sun | 40 | 73% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…