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(UA) United Airlines 646 On-Time Performance Rating

Date Range:

01-Sep-2025 to 31-Oct-2025

(SLC) Salt Lake City International Airport

Salt Lake City, UT, US

(SFO) San Francisco International Airport

San Francisco, CA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
42
78%
Late
4
7%
Very Late
3
6%
Excessive
5
9%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
54
Total Delays ( > 1 min )
21
Codeshares
0
Average Delay (min.)
31.952380952380953
Standard Deviation
32
Min
0
Max
108

UA 646 On-Time Performance Details

Overall Rating
2.4 of 5
Average
Percentage On-Time 78%
Average Delay Time 31.952380952380953 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.4 shows that this flight has on-time performance characteristics better than 47% of all other flights in the FlightStats database.
On-Time Performance Rating
2.9 of 5
Average
Percentage On-Time 78%
This flight has an on-time performance of 78%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 58% of other flights.
Delay Performance
1.9 of 5
Average
Average Delay Time 31.952380952380953 min
This flight has an average delay of 31.952380952380953 minutes with a standard deviation of 32 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 38% of other flights.

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