background

(UA) United Airlines 9644 On-Time Performance Rating

Date Range:

01-Sep-2026 to 31-Oct-2026

(STR) Stuttgart Airport

Stuttgart, DE

(LHR) London Heathrow Airport

London, EN, GB

On-Time Performance Chart

(using rounded numbers)
On-Time
34
65%
Late
9
17%
Very Late
6
12%
Excessive
3
6%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
52
Total Delays ( > 1 min )
38
Codeshares
52
Average Delay (min.)
19.657894736842106
Standard Deviation
19.5
Min
0
Max
101

UA 9644 On-Time Performance Details

Overall Rating
2.3 of 5
Average
Percentage On-Time 65%
Average Delay Time 19.657894736842106 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.3 shows that this flight has on-time performance characteristics better than 45% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 65%
This flight has an on-time performance of 65%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 1% of other flights.
Delay Performance
4.5 of 5
Good
Average Delay Time 19.657894736842106 min
This flight has an average delay of 19.657894736842106 minutes with a standard deviation of 19.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 90% of other flights.