background

(UA) United Airlines 4231 On-Time Performance Rating

Date Range:

15-Aug-2026 to 15-Oct-2026

(IAH) Houston George Bush Intercontinental Airport

Houston, TX, US

(BHM) Birmingham-Shuttlesworth International Airport

Birmingham, AL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
39
87%
Late
3
7%
Very Late
0
0%
Excessive
2
4%
Cancelled
1
2%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
45
Total Delays ( > 1 min )
8
Codeshares
45
Average Delay (min.)
26.75
Standard Deviation
27.4
Min
0
Max
84

UA 4231 On-Time Performance Details

Overall Rating
3.9 of 5
Good
Percentage On-Time 87%
Average Delay Time 26.75 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.9 shows that this flight has on-time performance characteristics better than 77% of all other flights in the FlightStats database.
On-Time Performance Rating
4.7 of 5
Very Good
Percentage On-Time 87%
This flight has an on-time performance of 87%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 95% of other flights.
Delay Performance
3.1 of 5
Average
Average Delay Time 26.75 min
This flight has an average delay of 26.75 minutes with a standard deviation of 27.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 62% of other flights.

Other Stops for UA 4231