Flight UA2852
United Airlines flight UA2852
Looking for UA2852 in the airâŚ
Miami (MIA) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 23% of the time, and when it is late the delay averages 79 minutes. It was cancelled 0.4% of the time.
- On-time arrivals
- 77.2%
- Less than 15 minutes late
- Cancelled
- 0.4%
- Of scheduled flights
- Average delay when late
- 79 min
- Flights arriving 15+ minutes late
- Flights tracked
- 237
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 42%
- Air traffic control & airport 40%
- Airline (crew, maintenance, cleaning) 17%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Reno (RNO)
Historically, this flight arrives 15+ minutes late 34% of the time, and when it is late the delay averages 77 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 66.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 77 min
- Flights arriving 15+ minutes late
- Flights tracked
- 137
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 50%
- Airline (crew, maintenance, cleaning) 42%
- Air traffic control & airport 5%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dulles (IAD) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 16% of the time, and when it is late the delay averages 58 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 84.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 101
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 49%
- Late-arriving aircraft 31%
- Airline (crew, maintenance, cleaning) 21%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Newark (EWR) to Miami (MIA)
Historically, this flight arrives 15+ minutes late 11% of the time, and when it is late the delay averages 58 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 88.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 53
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 49%
- Air traffic control & airport 35%
- Late-arriving aircraft 16%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Miami (MIA)
Historically, this flight arrives 15+ minutes late 22% of the time, and when it is late the delay averages 72 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 78.4%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 72 min
- Flights arriving 15+ minutes late
- Flights tracked
- 37
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 74%
- Air traffic control & airport 20%
- Late-arriving aircraft 5%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Houston (IAH) to Miami (MIA)
Historically, this flight arrives 15+ minutes late 29% of the time, and when it is late the delay averages 94 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 70.8%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 94 min
- Flights arriving 15+ minutes late
- Flights tracked
- 24
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 65%
- Airline (crew, maintenance, cleaning) 35%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Portland (PWM) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 26% of the time, and when it is late the delay averages 89 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 73.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 89 min
- Flights arriving 15+ minutes late
- Flights tracked
- 24
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 45%
- Air traffic control & airport 44%
- Airline (crew, maintenance, cleaning) 11%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Miami (MIA) to Newark (EWR)
Only 1 flight on record, which is too few for reliable odds.
- On-time arrivals
- 0.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 104 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 100%
- Airline (crew, maintenance, cleaning) 0%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 66.0% | 51 |
| October 2025 | 79.6% | 49 |
| November 2025 | 96.6% | 29 |
| December 2025 | 78.6% | 42 |
| January 2026 | 78.7% | 61 |
| February 2026 | 88.0% | 50 |
| March 2026 | 78.9% | 74 |
| April 2026 | 86.7% | 60 |
| May 2026 | 87.9% | 58 |
| June 2026 | 60.8% | 51 |
| July 2026 | 57.7% | 52 |
| August 2026 | 55.9% | 37 |
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