About 1 in 6 UA 1604 flights from Denver arrived 15+ minutes late, diverted or cancelled over the past year (17%); 0.3% were cancelled. The typical flight landed 7 minutes early.
UA 1604: DEN → RNO
Scheduled to leave Denver at 4:10 p.m. local time. Over the past year it arrived on time 83% of the time (362 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 | 53 | 83% |
| Tuesday | 51 | 90% |
| Wednesday | 52 | 87% |
| Thursday | 51 | 80% |
| Friday | 51 | 80% |
| Saturday | 52 | 85% |
| Sunday | 52 | 75% |
Why it was late
All flights DEN → RNO · Connecting off UA 1604? Check the risk
UA 1604: SFO → DEN
Scheduled to leave San Francisco at 10:40 a.m. local time. Over the past year it arrived on time 66% of the time (158 flights), better than other UA flights on the route at that hour (61%). Last seen in the data Aug 10, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 23 | 48% |
| Tuesday | 21 | 81% |
| Wednesday | 22 | 55% |
| Thursday | 23 | 78% |
| Friday | 23 | 70% |
| Saturday | 23 | 74% |
| Sunday | 23 | 57% |
Why it was late
All flights SFO → DEN · Connecting off UA 1604? Check the risk
Questions
How often is UA 1604 from DEN to RNO late?
United Airlines 1604 from Denver, CO to Reno, NV arrived 15 or more minutes late, was diverted or was cancelled on 17% of 362 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.
How often is UA 1604 from SFO to DEN late?
United Airlines 1604 from San Francisco, CA to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 34% of 158 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.