Flight UA1678
United Airlines flight UA1678
Looking for UA1678 in the airâŚ
Alerts at this flight's airports
San Francisco (SFO) to Washington (DCA)
Historically, this flight arrives 15+ minutes late 12% of the time, and when it is late the delay averages 54 minutes. It was cancelled 0.6% of the time.
- On-time arrivals
- 88.0%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 54 min
- Flights arriving 15+ minutes late
- Flights tracked
- 363
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 68%
- Late-arriving aircraft 23%
- Airline (crew, maintenance, cleaning) 10%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Washington (DCA) to Houston (IAH)
Historically, this flight arrives 15+ minutes late 30% of the time, and when it is late the delay averages 117 minutes. It was cancelled 0.8% of the time.
- On-time arrivals
- 70.5%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 117 min
- Flights arriving 15+ minutes late
- Flights tracked
- 133
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 60%
- Airline (crew, maintenance, cleaning) 24%
- Air traffic control & airport 15%
- Security 0%
- Extreme weather 0%
Share of delay minutes airlines attributed to each cause (BTS).
Phoenix (PHX) to San Francisco (SFO)
Historically, this flight arrives 15+ minutes late 0% of the time. It was cancelled 0.0% of the time.
- 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
- 78
- Scheduled flights in the period
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 75.0% | 30 |
| October 2025 | 87.1% | 31 |
| November 2025 | 96.7% | 30 |
| December 2025 | 94.8% | 58 |
| January 2026 | 96.2% | 54 |
| February 2026 | 90.2% | 51 |
| March 2026 | 86.0% | 58 |
| April 2026 | 87.5% | 56 |
| May 2026 | 84.2% | 57 |
| June 2026 | 82.4% | 35 |
| July 2026 | 73.2% | 57 |
| August 2026 | 73.2% | 57 |
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