About 1 in 9 UA 670 flights from Denver arrived 15+ minutes late, diverted or cancelled over the past year (11%); 0.0% were cancelled. The typical flight landed 6 minutes early.
UA 670: DEN → SJC
Scheduled to leave Denver at 11:50 a.m. local time. Over the past year it arrived on time 89% of the time (171 flights), better than other UA flights on the route at that hour (84%). Last seen in the data Jun 24, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 25 | 96% |
| Tuesday | 25 | 84% |
| Wednesday | 25 | 88% |
| Thursday | 24 | 88% |
| Friday | 24 | 83% |
| Saturday | 24 | 88% |
| Sunday | 24 | 96% |
Why it was late
All flights DEN → SJC · Connecting off UA 670? Check the risk
UA 670: EWR → DEN
Scheduled to leave Newark at 6:00 a.m. local time. Over the past year it arrived on time 95% of the time (166 flights), in line with other UA flights on the route at that hour (93%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 26 | 96% |
| Tuesday | 22 | 91% |
| Wednesday | 17 | — |
| Thursday | 26 | 96% |
| Friday | 26 | 96% |
| Saturday | 23 | 91% |
| Sunday | 26 | 96% |
Why it was late
All flights EWR → DEN · Connecting off UA 670? Check the risk
Questions
How often is UA 670 from DEN to SJC late?
United Airlines 670 from Denver, CO to San Jose, CA arrived 15 or more minutes late, was diverted or was cancelled on 11% of 171 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is UA 670 from EWR to DEN late?
United Airlines 670 from Newark, NJ to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 5% of 166 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.