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(UA) United Airlines 4039 On-Time Performance Rating

Date Range:

01-Apr-2026 to 31-May-2026

(SLC) Salt Lake City International Airport

Salt Lake City, UT, US

(IAH) Houston George Bush Intercontinental Airport

Houston, TX, US

On-Time Performance Chart

(using rounded numbers)
On-Time
23
85%
Late
0
0%
Very Late
1
4%
Excessive
2
7%
Cancelled
1
4%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
27
Total Delays ( > 1 min )
4
Codeshares
27
Average Delay (min.)
47.25
Standard Deviation
37.1
Min
0
Max
99

UA 4039 On-Time Performance Details

Overall Rating
2.7 of 5
Average
Percentage On-Time 85%
Average Delay Time 47.25 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.7 shows that this flight has on-time performance characteristics better than 52% of all other flights in the FlightStats database.
On-Time Performance Rating
3.9 of 5
Good
Percentage On-Time 85%
This flight has an on-time performance of 85%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 79% of other flights.
Delay Performance
1.4 of 5
Poor
Average Delay Time 47.25 min
This flight has an average delay of 47.25 minutes with a standard deviation of 37.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 27% of other flights.

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