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(UA) United Airlines 4859 On-Time Performance Rating

Date Range:

01-Mar-2026 to 30-Apr-2026

(LBB) Lubbock Preston Smith International Airport

Lubbock, TX, US

(IAH) Houston George Bush Intercontinental Airport

Houston, TX, US

On-Time Performance Chart

(using rounded numbers)
On-Time
53
87%
Late
1
2%
Very Late
1
2%
Excessive
3
5%
Cancelled
2
3%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
60
Total Delays ( > 1 min )
8
Codeshares
60
Average Delay (min.)
91.5
Standard Deviation
138.8
Min
0
Max
349

UA 4859 On-Time Performance Details

Overall Rating
2.5 of 5
Average
Percentage On-Time 88%
Average Delay Time 91.5 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.5 shows that this flight has on-time performance characteristics better than 48% of all other flights in the FlightStats database.
On-Time Performance Rating
4.9 of 5
Very Good
Percentage On-Time 88%
This flight has an on-time performance of 88%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 98% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 91.5 min
This flight has an average delay of 91.5 minutes with a standard deviation of 138.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.