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(UA) United Airlines 838 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(NRT) Tokyo Narita International Airport

Tokyo, JP

(SFO) San Francisco International Airport

San Francisco, CA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
43
69%
Late
8
13%
Very Late
8
13%
Excessive
2
3%
Cancelled
0
0%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
61
Total Delays ( > 1 min )
32
Codeshares
0
Average Delay (min.)
37.3125
Standard Deviation
84.3
Min
0
Max
470

UA 838 On-Time Performance Details

Overall Rating
1.2 of 5
Poor
Percentage On-Time 71%
Average Delay Time 37.3125 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.2 shows that this flight has on-time performance characteristics better than 22% of all other flights in the FlightStats database.
On-Time Performance Rating
0.8 of 5
Poor
Percentage On-Time 71%
This flight has an on-time performance of 71%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 16% of other flights.
Delay Performance
1.5 of 5
Poor
Average Delay Time 37.3125 min
This flight has an average delay of 37.3125 minutes with a standard deviation of 84.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 31% of other flights.

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