Flight OddsUA558 DEN → BOS
United Airlines · Denver, CO to Boston, MA · 340 flights observed, 2025-07-01 to 2026-06-30 · 1,754 mi
UA558 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
91%
Median delay
-13 min
90th percentile
+12 min
Cancellation rate
1%
How often is UA558 on time?
Across 340 flights on DEN → BOS from 2025-07-01 to 2026-06-30, UA558 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +12 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 | 305 | 91% |
| 16-30 min | 13 | 4% |
| 31-60 min | 12 | 4% |
| 61-120 min | 3 | 1% |
| 2+ hrs | 3 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 97% | -9 min |
| 2025-08 | 31 | 84% | -1 min |
| 2025-09 | 30 | 87% | +12 min |
| 2025-10 | 30 | 77% | +5 min |
| 2025-11 | 26 | 88% | -6 min |
| 2025-12 | 24 | 92% | -12 min |
| 2026-01 | 20 | 95% | -23 min |
| 2026-02 | 23 | 100% | -20 min |
| 2026-03 | 31 | 84% | -8 min |
| 2026-04 | 30 | 93% | -21 min |
| 2026-05 | 31 | 97% | -20 min |
| 2026-06 | 29 | 100% | -22 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 50 | 92% |
| Tue | 46 | 93% |
| Wed | 48 | 90% |
| Thu | 50 | 90% |
| Fri | 51 | 94% |
| Sat | 39 | 90% |
| Sun | 52 | 87% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…