Flight OddsUA645 DEN → BOS
United Airlines · Denver, CO to Boston, MA · 37 flights observed, 2025-08-19 to 2025-09-24 · 1,754 mi
UA645 covers more than one route in the data window — the stats below are for DEN → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
35%
Median delay
+47 min
90th percentile
+154 min
Cancellation rate
0%
How often is UA645 on time?
Across 37 flights on DEN → BOS from 2025-08-19 to 2025-09-24, UA645 arrived within 15 minutes of schedule 35% of the time. The median arrival delay was +47 min, and the worst 10% of flights arrived +154 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 | 13 | 35% |
| 16-30 min | 1 | 3% |
| 31-60 min | 10 | 27% |
| 61-120 min | 8 | 22% |
| 2+ hrs | 5 | 14% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 13 | 77% | +26 min |
| 2025-09 | 24 | 13% | +74 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 20% |
| Tue | 6 | 33% |
| Wed | 6 | 33% |
| Thu | 5 | 40% |
| Fri | 5 | 0% |
| Sat | 5 | 100% |
| Sun | 5 | 20% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…