Flight OddsUA631 DEN → PHX
United Airlines · Denver, CO to Phoenix, AZ · 205 flights observed, 2025-10-26 to 2026-05-20 · 602 mi
UA631 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
88%
Median delay
-9 min
90th percentile
+19 min
Cancellation rate
0%
How often is UA631 on time?
Across 205 flights on DEN → PHX from 2025-10-26 to 2026-05-20, UA631 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +19 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 | 180 | 88% |
| 16-30 min | 10 | 5% |
| 31-60 min | 6 | 3% |
| 61-120 min | 7 | 3% |
| 2+ hrs | 1 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 100% | -14 min |
| 2025-11 | 27 | 85% | -2 min |
| 2025-12 | 31 | 87% | -2 min |
| 2026-01 | 31 | 84% | +0 min |
| 2026-02 | 28 | 89% | +2 min |
| 2026-03 | 31 | 87% | -7 min |
| 2026-04 | 30 | 93% | -3 min |
| 2026-05 | 20 | 90% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 30 | 93% |
| Tue | 30 | 97% |
| Wed | 30 | 83% |
| Thu | 28 | 89% |
| Fri | 28 | 79% |
| Sat | 28 | 86% |
| Sun | 30 | 90% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…