About 1 in 3 UA 2155 flights from Idaho Falls arrived 15+ minutes late, diverted or cancelled over the past year (32%); 0.0% were cancelled. The typical flight landed 13 minutes early.
UA 2155: IDA → DEN
Scheduled to leave Idaho Falls at 2:30 p.m. local time. Over the past year it arrived on time 68% of the time (146 flights), worse than other UA flights on the route at that hour (78%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 23 | 65% |
| Tuesday | 17 | — |
| Wednesday | 17 | — |
| Thursday | 22 | 86% |
| Friday | 22 | 68% |
| Saturday | 22 | 64% |
| Sunday | 23 | 70% |
Why it was late
All flights IDA → DEN · Connecting off UA 2155? Check the risk
UA 2155: DEN → PIT
Scheduled to leave Denver at 5:38 p.m. local time. Over the past year it arrived on time 64% of the time (123 flights), worse than other UA flights on the route at that hour (75%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Denver to Pittsburgh (100% of days). United Airlines's last DEN–PIT flight was cancelled 0.8% of the time, against 0.2% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 10:05 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 18 | — |
| Tuesday | 17 | — |
| Wednesday | 17 | — |
| Thursday | 18 | — |
| Friday | 18 | — |
| Saturday | 17 | — |
| Sunday | 18 | — |
Why it was late
All flights DEN → PIT · Connecting off UA 2155? Check the risk
Questions
How often is UA 2155 from IDA to DEN late?
United Airlines 2155 from Idaho Falls, ID to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 32% of 146 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is UA 2155 from DEN to PIT late?
United Airlines 2155 from Denver, CO to Pittsburgh, PA arrived 15 or more minutes late, was diverted or was cancelled on 36% of 123 scheduled flights between September 2025 and August 2026. 0.8% 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.