Flight UA1791
United Airlines flight UA1791
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Watch Ground Delay Program SAN
Ground Delay Program at San Diego International Airport (SAN): Average 37 minutes, up to 1 hour and 11 minutes
Reason: airport volume
Airport status
Los Angeles (LAX) to San Francisco (SFO)
Historically, this flight arrives 15+ minutes late 45% of the time, and when it is late the delay averages 50 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 55.4%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 50 min
- Flights arriving 15+ minutes late
- Flights tracked
- 316
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 85%
- Late-arriving aircraft 9%
- Airline (crew, maintenance, cleaning) 6%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Dulles (IAD)
Historically, this flight arrives 15+ minutes late 31% of the time, and when it is late the delay averages 72 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 68.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 72 min
- Flights arriving 15+ minutes late
- Flights tracked
- 121
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 46%
- Air traffic control & airport 37%
- Airline (crew, maintenance, cleaning) 17%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Detroit (DTW)
Historically, this flight arrives 15+ minutes late 7% of the time, and when it is late the delay averages 36 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 92.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 36 min
- Flights arriving 15+ minutes late
- Flights tracked
- 27
- 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).
San Diego (SAN) to San Francisco (SFO)
Historically, this flight arrives 15+ minutes late 62% of the time, and when it is late the delay averages 60 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 38.1%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 60 min
- Flights arriving 15+ minutes late
- Flights tracked
- 21
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 50%
- Airline (crew, maintenance, cleaning) 29%
- Late-arriving aircraft 21%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Diego (SAN) to Los Angeles (LAX)
Only 19 flights on record, which is too few for reliable odds.
- On-time arrivals
- 94.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 21 min
- Flights arriving 15+ minutes late
- Flights tracked
- 19
- 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).
San Francisco (SFO) to Reno (RNO)
Only 13 flights on record, which is too few for reliable odds.
- On-time arrivals
- 92.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 75 min
- Flights arriving 15+ minutes late
- Flights tracked
- 13
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 97%
- Airline (crew, maintenance, cleaning) 3%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Boston (BOS)
Only 4 flights on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- â
- Flights arriving 15+ minutes late
- Flights tracked
- 4
- Scheduled flights in the period
Burlington (BTV) to Newark (EWR)
Only 1 flight on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- â
- Flights arriving 15+ minutes late
- Flights tracked
- 1
- Scheduled flights in the period
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 72.5% | 40 |
| October 2025 | 66.7% | 30 |
| November 2025 | 55.2% | 29 |
| December 2025 | 45.2% | 31 |
| January 2026 | 78.4% | 37 |
| February 2026 | 57.6% | 33 |
| March 2026 | 90.9% | 33 |
| April 2026 | 63.3% | 60 |
| May 2026 | 48.3% | 60 |
| June 2026 | 66.1% | 56 |
| July 2026 | 72.4% | 58 |
| August 2026 | 41.8% | 55 |
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