Flight OddsUA421 DEN → PWM
United Airlines · Denver, CO to Portland, ME · 7 flights observed, 2025-07-05 to 2025-08-16 · 1,782 mi
UA421 covers more than one route in the data window — the stats below are for DEN → PWM, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
71%
Median delay
-4 min
90th percentile
+116 min
Cancellation rate
0%
How often is UA421 on time?
Across 7 flights on DEN → PWM from 2025-07-05 to 2025-08-16, UA421 arrived within 15 minutes of schedule 71% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +116 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 | 5 | 71% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 1 | 14% |
| 2+ hrs | 1 | 14% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 4 | 50% | +57 min |
| 2025-08 | 3 | 100% | -4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | No data | — |
| Wed | No data | — |
| Thu | No data | — |
| Fri | No data | — |
| Sat | 7 | 71% |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…