About 1 in 8 UA 2643 flights from Denver arrived 15+ minutes late, diverted or cancelled over the past year (13%); 0.3% were cancelled. The typical flight landed 8 minutes early.
UA 2643: DEN → BDL
Scheduled to leave Denver at 9:45 a.m. local time. Over the past year it arrived on time 87% of the time (293 flights), in line with other UA flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 43 | 84% |
| Tuesday | 41 | 80% |
| Wednesday | 41 | 93% |
| Thursday | 42 | 90% |
| Friday | 42 | 86% |
| Saturday | 42 | 88% |
| Sunday | 42 | 86% |
Why it was late
All flights DEN → BDL · Connecting off UA 2643? Check the risk
UA 2643: IAH → DEN
Scheduled to leave Houston at 6:30 a.m. local time. Over the past year it arrived on time 95% of the time (135 flights), in line with other UA flights on the route at that hour (95%). Last seen in the data Aug 10, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 20 | 100% |
| Tuesday | 19 | — |
| Wednesday | 19 | — |
| Thursday | 19 | — |
| Friday | 19 | — |
| Saturday | 19 | — |
| Sunday | 20 | 100% |
Why it was late
All flights IAH → DEN · Connecting off UA 2643? Check the risk
Questions
How often is UA 2643 from DEN to BDL late?
United Airlines 2643 from Denver, CO to Hartford, CT arrived 15 or more minutes late, was diverted or was cancelled on 13% of 293 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.
How often is UA 2643 from IAH to DEN late?
United Airlines 2643 from Houston, TX to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 5% of 135 scheduled flights between September 2025 and August 2026. 0.7% 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.