About 1 in 4 UA 2173 flights from Boise arrived 15+ minutes late, diverted or cancelled over the past year (25%); 0.3% were cancelled. The typical flight landed 4 minutes early.
UA 2173: BOI → DEN
Scheduled to leave Boise at 2:40 p.m. local time. Over the past year it arrived on time 75% of the time (364 flights), in line with other UA flights on the route at that hour (75%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 75% |
| Tuesday | 52 | 83% |
| Wednesday | 52 | 81% |
| Thursday | 51 | 71% |
| Friday | 52 | 67% |
| Saturday | 52 | 71% |
| Sunday | 52 | 79% |
Why it was late
All flights BOI → DEN · Connecting off UA 2173? Check the risk
UA 2173: DEN → HDN
Scheduled to leave Denver at 7:15 p.m. local time. Over the past year it arrived on time 52% of the time (155 flights), worse than other UA flights on the route at that hour (65%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Denver to Hayden (100% of days). United Airlines's last DEN–HDN flight was cancelled 0.5% of the time, against 0.5% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 11:24 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 23 | 43% |
| Tuesday | 22 | 68% |
| Wednesday | 22 | 50% |
| Thursday | 22 | 50% |
| Friday | 22 | 50% |
| Saturday | 21 | 62% |
| Sunday | 23 | 43% |
Why it was late
All flights DEN → HDN · Connecting off UA 2173? Check the risk
Questions
How often is UA 2173 from BOI to DEN late?
United Airlines 2173 from Boise, ID to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 25% of 364 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.
How often is UA 2173 from DEN to HDN late?
United Airlines 2173 from Denver, CO to Hayden, CO arrived 15 or more minutes late, was diverted or was cancelled on 48% of 155 scheduled flights between September 2025 and August 2026. 1.3% 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.