Flight UA2004
United Airlines flight UA2004
Looking for UA2004 in the airâŚ
Alerts at this flight's airports
Salt Lake City (SLC) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 7% of the time, and when it is late the delay averages 68 minutes. It was cancelled 1.4% of the time.
- On-time arrivals
- 92.8%
- Less than 15 minutes late
- Cancelled
- 1.4%
- Of scheduled flights
- Average delay when late
- 68 min
- Flights arriving 15+ minutes late
- Flights tracked
- 70
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 71%
- Airline (crew, maintenance, cleaning) 19%
- Air traffic control & airport 10%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Austin (AUS)
Historically, this flight arrives 15+ minutes late 23% of the time, and when it is late the delay averages 38 minutes. It was cancelled 1.7% of the time.
- On-time arrivals
- 77.2%
- Less than 15 minutes late
- Cancelled
- 1.7%
- Of scheduled flights
- Average delay when late
- 38 min
- Flights arriving 15+ minutes late
- Flights tracked
- 58
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 62%
- Airline (crew, maintenance, cleaning) 34%
- Air traffic control & airport 4%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Newark (EWR) to San Francisco (SFO)
Historically, this flight arrives 15+ minutes late 22% of the time, and when it is late the delay averages 87 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 78.1%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 87 min
- Flights arriving 15+ minutes late
- Flights tracked
- 32
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 49%
- Late-arriving aircraft 35%
- Airline (crew, maintenance, cleaning) 15%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Boston (BOS)
Historically, this flight arrives 15+ minutes late 23% of the time, and when it is late the delay averages 104 minutes. It was cancelled 4.3% of the time.
- On-time arrivals
- 77.3%
- Less than 15 minutes late
- Cancelled
- 4.3%
- Of scheduled flights
- Average delay when late
- 104 min
- Flights arriving 15+ minutes late
- Flights tracked
- 23
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 87%
- Air traffic control & airport 11%
- Airline (crew, maintenance, cleaning) 3%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Omaha (OMA) to Houston (IAH)
Historically, this flight arrives 15+ minutes late 5% of the time, and when it is late the delay averages 109 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 95.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 109 min
- Flights arriving 15+ minutes late
- Flights tracked
- 21
- 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).
Chicago (ORD) to Hartford (BDL)
Historically, this flight arrives 15+ minutes late 33% of the time, and when it is late the delay averages 119 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 66.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 119 min
- Flights arriving 15+ minutes late
- Flights tracked
- 21
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 43%
- Late-arriving aircraft 36%
- Air traffic control & airport 18%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Newark (EWR)
Only 18 flights on record, which is too few for reliable odds.
- On-time arrivals
- 66.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 79 min
- Flights arriving 15+ minutes late
- Flights tracked
- 18
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 49%
- Late-arriving aircraft 23%
- Extreme weather 18%
- Airline (crew, maintenance, cleaning) 10%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Phoenix (PHX) to Chicago (ORD)
Only 16 flights on record, which is too few for reliable odds.
- On-time arrivals
- 87.5%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 89 min
- Flights arriving 15+ minutes late
- Flights tracked
- 16
- 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).
Denver (DEN) to Panama City Beach (ECP)
Only 6 flights on record, which is too few for reliable odds.
- On-time arrivals
- 16.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 52 min
- Flights arriving 15+ minutes late
- Flights tracked
- 6
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 48%
- Air traffic control & airport 29%
- Late-arriving aircraft 23%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Indianapolis (IND)
Only 6 flights on record, which is too few for reliable odds.
- On-time arrivals
- 83.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 112 min
- Flights arriving 15+ minutes late
- Flights tracked
- 6
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 100%
- Airline (crew, maintenance, cleaning) 0%
- Air traffic control & airport 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 | 50.0% | 2 |
| October 2025 | 33.3% | 3 |
| November 2025 | 84.2% | 20 |
| December 2025 | 78.1% | 32 |
| January 2026 | 88.0% | 26 |
| February 2026 | 67.9% | 28 |
| March 2026 | 85.7% | 7 |
| April 2026 | 76.7% | 30 |
| May 2026 | 92.9% | 29 |
| June 2026 | 87.9% | 33 |
| July 2026 | 83.3% | 30 |
| August 2026 | 74.2% | 31 |
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