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(UA) United Airlines 4 On-Time Performance Rating

Date Range:

15-Feb-2026 to 15-Apr-2026

(LHR) London Heathrow Airport

London, EN, GB

(IAH) Houston George Bush Intercontinental Airport

Houston, TX, US

On-Time Performance Chart

(using rounded numbers)
On-Time
49
80%
Late
5
8%
Very Late
2
3%
Excessive
5
8%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
61
Total Delays ( > 1 min )
20
Codeshares
0
Average Delay (min.)
31.55
Standard Deviation
35
Min
0
Max
152

UA 4 On-Time Performance Details

Overall Rating
3.4 of 5
Average
Percentage On-Time 80%
Average Delay Time 31.55 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.4 shows that this flight has on-time performance characteristics better than 66% of all other flights in the FlightStats database.
On-Time Performance Rating
3.8 of 5
Good
Percentage On-Time 80%
This flight has an on-time performance of 80%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 76% of other flights.
Delay Performance
2.9 of 5
Average
Average Delay Time 31.55 min
This flight has an average delay of 31.55 minutes with a standard deviation of 35 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 58% of other flights.