About 1 in 7 UA 2255 flights from Hayden arrived 15+ minutes late, diverted or cancelled over the past year (15%); 1.6% were cancelled. The typical flight landed 18 minutes early.
UA 2255: HDN → DEN
Scheduled to leave Hayden at 7:00 a.m. local time. Over the past year it arrived on time 85% of the time (257 flights), in line with other UA flights on the route at that hour (85%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 37 | 95% |
| Tuesday | 36 | 83% |
| Wednesday | 36 | 86% |
| Thursday | 37 | 86% |
| Friday | 37 | 81% |
| Saturday | 37 | 78% |
| Sunday | 37 | 86% |
Why it was late
All flights HDN → DEN · Connecting off UA 2255? Check the risk
UA 2255: DEN → BOI
Scheduled to leave Denver at 11:35 a.m. local time. Over the past year it arrived on time 81% of the time (156 flights), in line with other UA flights on the route at that hour (84%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 23 | 91% |
| Tuesday | 22 | 86% |
| Wednesday | 22 | 77% |
| Thursday | 22 | 86% |
| Friday | 22 | 73% |
| Saturday | 22 | 73% |
| Sunday | 23 | 83% |
Why it was late
All flights DEN → BOI · Connecting off UA 2255? Check the risk
Questions
How often is UA 2255 from HDN to DEN late?
United Airlines 2255 from Hayden, CO to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 15% of 257 scheduled flights between September 2025 and August 2026. 1.6% were cancelled.
How often is UA 2255 from DEN to BOI late?
United Airlines 2255 from Denver, CO to Boise, ID arrived 15 or more minutes late, was diverted or was cancelled on 19% of 156 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check United Airlines for today's flight. Method.