About 1 in 4 UA 1729 flights from Denver arrived 15+ minutes late, diverted or cancelled over the past year (28%); 0.0% were cancelled. The typical flight landed 0 minutes early.
UA 1729: DEN → PHX
Scheduled to leave Denver at 7:15 p.m. local time. Over the past year it arrived on time 72% of the time (201 flights), worse than 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 | 29 | 55% |
| Tuesday | 28 | 86% |
| Wednesday | 28 | 79% |
| Thursday | 29 | 66% |
| Friday | 29 | 69% |
| Saturday | 29 | 72% |
| Sunday | 29 | 76% |
Why it was late
All flights DEN → PHX · Connecting off UA 1729? Check the risk
UA 1729: LGA → DEN
Scheduled to leave New York at 3:20 p.m. local time. Over the past year it arrived on time 56% of the time (174 flights), worse than other UA flights on the route at that hour (67%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 24 | 54% |
| Tuesday | 24 | 58% |
| Wednesday | 24 | 58% |
| Thursday | 26 | 58% |
| Friday | 26 | 54% |
| Saturday | 26 | 58% |
| Sunday | 24 | 54% |
Why it was late
All flights LGA → DEN · Connecting off UA 1729? Check the risk
Questions
How often is UA 1729 from DEN to PHX late?
United Airlines 1729 from Denver, CO to Phoenix, AZ arrived 15 or more minutes late, was diverted or was cancelled on 28% of 201 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is UA 1729 from LGA to DEN late?
United Airlines 1729 from New York, NY to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 44% of 174 scheduled flights between September 2025 and August 2026. 2.3% 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.