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(UA) United Airlines 639 On-time Performance Rating

Date Range:

01-Jul-2018 to 31-Aug-2018

(SFO) San Francisco International Airport

San Francisco, CA, US

(ORD) O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
50
76%
Late
6
9%
Very Late
1
2%
Excessive
7
11%
Cancelled
0
0%
Diverted
2
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
64
Total Delays ( > 1 min )
41
Codeshares
0
Average Delay (min.)
18
Standard Deviation
24.6
Min
0
Max
80

UA 639 On-time Performance Details

Overall Rating
4.5 of 5
Good
Percentage On-Time 78%
Average Delay Time 18 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.5 shows that this flight has on-time performance characteristics better than 89% of all other flights in the FlightStats database.
On-time Performance Rating
4.2 of 5
Good
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 84% of other flights.
Delay Performance
4.8 of 5
Very Good
Average Delay Time 18 min
This flight has an average delay of 18 minutes with a standard deviation of 24.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 96% of other flights.