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(UA) United Airlines 3989 On-Time Performance Rating

Date Range:

15-Jun-2026 to 15-Aug-2026

(IAH) Houston George Bush Intercontinental Airport

Houston, TX, US

(SAT) San Antonio International Airport

San Antonio, TX, US

On-Time Performance Chart

(using rounded numbers)
On-Time
8
67%
Late
1
8%
Very Late
2
17%
Excessive
1
8%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
12
Total Delays ( > 1 min )
4
Codeshares
12
Average Delay (min.)
42.75
Standard Deviation
34.8
Min
0
Max
94

UA 3989 On-Time Performance Details

Overall Rating
1.9 of 5
Average
Percentage On-Time 67%
Average Delay Time 42.75 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.9 shows that this flight has on-time performance characteristics better than 37% of all other flights in the FlightStats database.
On-Time Performance Rating
1.7 of 5
Average
Percentage On-Time 67%
This flight has an on-time performance of 67%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 34% of other flights.
Delay Performance
2.1 of 5
Average
Average Delay Time 42.75 min
This flight has an average delay of 42.75 minutes with a standard deviation of 34.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 42% of other flights.

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