Flight OddsUA1521 DEN → CLE
United Airlines · Denver, CO to Cleveland, OH · 248 flights observed, 2025-07-01 to 2026-04-29 · 1,201 mi
UA1521 covers more than one route in the data window — the stats below are for DEN → CLE, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
86%
Median delay
-7 min
90th percentile
+21 min
Cancellation rate
0%
How often is UA1521 on time?
Across 248 flights on DEN → CLE from 2025-07-01 to 2026-04-29, UA1521 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +21 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 | 214 | 86% |
| 16-30 min | 14 | 6% |
| 31-60 min | 12 | 5% |
| 61-120 min | 4 | 2% |
| 2+ hrs | 4 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 87% | +0 min |
| 2025-08 | 31 | 81% | +4 min |
| 2025-09 | 30 | 87% | -2 min |
| 2025-10 | 31 | 81% | +5 min |
| 2025-12 | 30 | 87% | -4 min |
| 2026-01 | 31 | 87% | -1 min |
| 2026-02 | 28 | 86% | +0 min |
| 2026-03 | 7 | 86% | -2 min |
| 2026-04 | 29 | 97% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 35 | 94% |
| Tue | 37 | 92% |
| Wed | 37 | 89% |
| Thu | 35 | 80% |
| Fri | 35 | 91% |
| Sat | 34 | 79% |
| Sun | 35 | 77% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…