Flight UA2643
United Airlines flight UA2643
Looking for UA2643 in the airâŚ
Denver (DEN) to Hartford (BDL)
Historically, this flight arrives 15+ minutes late 13% of the time, and when it is late the delay averages 53 minutes. It was cancelled 0.3% of the time.
- On-time arrivals
- 87.0%
- Less than 15 minutes late
- Cancelled
- 0.3%
- Of scheduled flights
- Average delay when late
- 53 min
- Flights arriving 15+ minutes late
- Flights tracked
- 293
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 44%
- Late-arriving aircraft 37%
- Air traffic control & airport 19%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Salt Lake City (SLC) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 9% of the time, and when it is late the delay averages 66 minutes. It was cancelled 0.6% of the time.
- On-time arrivals
- 90.7%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 66 min
- Flights arriving 15+ minutes late
- Flights tracked
- 162
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 46%
- Late-arriving aircraft 39%
- Airline (crew, maintenance, cleaning) 14%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Houston (IAH) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 4% of the time, and when it is late the delay averages 53 minutes. It was cancelled 0.7% of the time.
- On-time arrivals
- 95.5%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 53 min
- Flights arriving 15+ minutes late
- Flights tracked
- 135
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 38%
- Air traffic control & airport 27%
- Extreme weather 19%
- Late-arriving aircraft 16%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
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Headlines found by Google News; stories open on the publisher's site.
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 81.7% | 60 |
| October 2025 | 90.2% | 61 |
| November 2025 | 93.2% | 59 |
| December 2025 | 90.6% | 32 |
| January 2026 | 90.0% | 31 |
| February 2026 | 96.3% | 28 |
| March 2026 | 79.4% | 34 |
| April 2026 | 93.3% | 60 |
| May 2026 | 90.3% | 62 |
| June 2026 | 91.7% | 60 |
| July 2026 | 91.8% | 62 |
| August 2026 | 90.2% | 41 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 â August 2026. Covers flights operated by reporting U.S. carriers. About our data