Flight UA648
United Airlines flight UA648
Looking for UA648 in the airâŚ
Alerts at this flight's airports
Newark (EWR) to San Francisco (SFO)
Historically, this flight arrives 15+ minutes late 29% of the time, and when it is late the delay averages 77 minutes. It was cancelled 1.6% of the time.
- On-time arrivals
- 70.9%
- Less than 15 minutes late
- Cancelled
- 1.6%
- Of scheduled flights
- Average delay when late
- 77 min
- Flights arriving 15+ minutes late
- Flights tracked
- 365
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 38%
- Airline (crew, maintenance, cleaning) 34%
- Late-arriving aircraft 27%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
St Louis (STL) to Newark (EWR)
Historically, this flight arrives 15+ minutes late 8% of the time, and when it is late the delay averages 71 minutes. It was cancelled 12.8% of the time.
- On-time arrivals
- 92.5%
- Less than 15 minutes late
- Cancelled
- 12.8%
- Of scheduled flights
- Average delay when late
- 71 min
- Flights arriving 15+ minutes late
- Flights tracked
- 47
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 68%
- Extreme weather 21%
- Air traffic control & airport 11%
- Late-arriving aircraft 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Minneapolis (MSP)
Historically, this flight arrives 15+ minutes late 67% of the time, and when it is late the delay averages 82 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 33.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 82 min
- Flights arriving 15+ minutes late
- Flights tracked
- 24
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 80%
- Airline (crew, maintenance, cleaning) 15%
- Air traffic control & airport 4%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Chicago (ORD)
Only 14 flights on record, which is too few for reliable odds.
- On-time arrivals
- 78.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 38 min
- Flights arriving 15+ minutes late
- Flights tracked
- 14
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 68%
- Airline (crew, maintenance, cleaning) 32%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
PBI â EWR
Only 9 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
- 9
- Scheduled flights in the period
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.7% | 39 |
| October 2025 | 60.0% | 31 |
| November 2025 | 70.0% | 30 |
| December 2025 | 45.2% | 31 |
| January 2026 | 86.2% | 31 |
| February 2026 | 73.1% | 28 |
| March 2026 | 87.1% | 31 |
| April 2026 | 80.0% | 30 |
| May 2026 | 75.0% | 45 |
| June 2026 | 55.3% | 38 |
| July 2026 | 73.0% | 79 |
| August 2026 | 65.1% | 46 |
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