Flight UA1789
United Airlines flight UA1789
Looking for UA1789 in the airâŚ
Dulles (IAD) to San Antonio (SAT)
Historically, this flight arrives 15+ minutes late 6% of the time, and when it is late the delay averages 54 minutes. It was cancelled 0.8% of the time.
- On-time arrivals
- 93.5%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 54 min
- Flights arriving 15+ minutes late
- Flights tracked
- 264
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 43%
- Late-arriving aircraft 32%
- Air traffic control & airport 25%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Raleigh/Durham (RDU) to Dulles (IAD)
Historically, this flight arrives 15+ minutes late 4% of the time, and when it is late the delay averages 69 minutes. It was cancelled 1.5% of the time.
- On-time arrivals
- 96.4%
- Less than 15 minutes late
- Cancelled
- 1.5%
- Of scheduled flights
- Average delay when late
- 69 min
- Flights arriving 15+ minutes late
- Flights tracked
- 198
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 90%
- Air traffic control & airport 10%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Antonio (SAT) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 14% of the time, and when it is late the delay averages 79 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 85.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 79 min
- Flights arriving 15+ minutes late
- Flights tracked
- 111
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 61%
- Air traffic control & airport 21%
- Airline (crew, maintenance, cleaning) 18%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Dulles (IAD) to Norfolk (ORF)
Historically, this flight arrives 15+ minutes late 5% of the time, and when it is late the delay averages 38 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
- 38 min
- Flights arriving 15+ minutes late
- Flights tracked
- 21
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 100%
- Late-arriving aircraft 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 | 95.2% | 21 |
| October 2025 | 100.0% | 24 |
| November 2025 | 93.3% | 30 |
| December 2025 | 85.4% | 41 |
| January 2026 | 89.4% | 48 |
| February 2026 | 95.7% | 46 |
| March 2026 | 89.9% | 80 |
| April 2026 | 91.5% | 72 |
| May 2026 | 95.0% | 60 |
| June 2026 | 96.4% | 56 |
| July 2026 | 92.7% | 56 |
| August 2026 | 96.7% | 60 |
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