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(UA) United Airlines 4639 On-Time Performance Rating

Date Range:

15-May-2026 to 15-Jul-2026

(IAH) Houston George Bush Intercontinental Airport

Houston, TX, US

(LIT) Bill and Hillary Clinton National Airport

Little Rock, AR, US

On-Time Performance Chart

(using rounded numbers)
On-Time
8
73%
Late
1
9%
Very Late
1
9%
Excessive
1
9%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
11
Total Delays ( > 1 min )
3
Codeshares
11
Average Delay (min.)
38.333333333333336
Standard Deviation
13.3
Min
0
Max
53

UA 4639 On-Time Performance Details

Overall Rating
2.2 of 5
Average
Percentage On-Time 73%
Average Delay Time 38.333333333333336 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.2 shows that this flight has on-time performance characteristics better than 43% of all other flights in the FlightStats database.
On-Time Performance Rating
2.1 of 5
Average
Percentage On-Time 73%
This flight has an on-time performance of 73%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 42% of other flights.
Delay Performance
2.3 of 5
Average
Average Delay Time 38.333333333333336 min
This flight has an average delay of 38.333333333333336 minutes with a standard deviation of 13.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 46% of other flights.

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