Flight OddsUA597 DEN → BOS
United Airlines · Denver, CO to Boston, MA · 277 flights observed, 2025-09-25 to 2026-06-30 · 1,754 mi
UA597 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
72%
Median delay
-7 min
90th percentile
+75 min
Cancellation rate
1%
How often is UA597 on time?
Across 277 flights on DEN → BOS from 2025-09-25 to 2026-06-30, UA597 arrived within 15 minutes of schedule 72% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +75 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 | 196 | 72% |
| 16-30 min | 21 | 8% |
| 31-60 min | 20 | 7% |
| 61-120 min | 21 | 8% |
| 2+ hrs | 14 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-09 | 6 | 33% | +85 min |
| 2025-10 | 31 | 48% | +49 min |
| 2025-11 | 29 | 76% | +17 min |
| 2025-12 | 31 | 90% | -6 min |
| 2026-01 | 28 | 89% | -8 min |
| 2026-02 | 25 | 72% | +13 min |
| 2026-03 | 31 | 61% | +11 min |
| 2026-04 | 30 | 80% | +2 min |
| 2026-05 | 31 | 74% | -1 min |
| 2026-06 | 30 | 67% | +13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 38 | 61% |
| Tue | 39 | 79% |
| Wed | 39 | 77% |
| Thu | 39 | 69% |
| Fri | 39 | 67% |
| Sat | 40 | 83% |
| Sun | 38 | 68% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…