background

(UA) United Airlines 857 On-Time Performance Rating

Date Range:

01-Aug-2026 to 30-Sep-2026

(SFO) San Francisco International Airport

San Francisco, CA, US

(PVG) Shanghai Pudong International Airport

Shanghai, CN

On-Time Performance Chart

(using rounded numbers)
On-Time
45
75%
Late
2
3%
Very Late
1
2%
Excessive
10
17%
Cancelled
2
3%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
60
Total Delays ( > 1 min )
20
Codeshares
0
Average Delay (min.)
59
Standard Deviation
71.5
Min
0
Max
288

UA 857 On-Time Performance Details

Overall Rating
1.3 of 5
Poor
Percentage On-Time 75%
Average Delay Time 59 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.3 shows that this flight has on-time performance characteristics better than 25% of all other flights in the FlightStats database.
On-Time Performance Rating
2.5 of 5
Average
Percentage On-Time 75%
This flight has an on-time performance of 75%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 50% of other flights.
Delay Performance
0.1 of 5
Very Poor
Average Delay Time 59 min
This flight has an average delay of 59 minutes with a standard deviation of 71.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 3% of other flights.