background

(UA) United Airlines 9837 On-Time Performance Rating

Date Range:

15-Nov-2025 to 15-Jan-2026

(VIE) Vienna International Airport

Vienna, AT

(TIA) Tirana Nene Tereza International Airport

Tirana, AL

On-Time Performance Chart

(using rounded numbers)
On-Time
41
67%
Late
11
18%
Very Late
5
8%
Excessive
3
5%
Cancelled
1
2%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
61
Total Delays ( > 1 min )
45
Codeshares
61
Average Delay (min.)
16.6
Standard Deviation
15.3
Min
0
Max
64

UA 9837 On-Time Performance Details

Overall Rating
2.8 of 5
Average
Percentage On-Time 67%
Average Delay Time 16.6 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.8 shows that this flight has on-time performance characteristics better than 54% of all other flights in the FlightStats database.
On-Time Performance Rating
0.6 of 5
Poor
Percentage On-Time 67%
This flight has an on-time performance of 67%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 12% of other flights.
Delay Performance
4.9 of 5
Very Good
Average Delay Time 16.6 min
This flight has an average delay of 16.6 minutes with a standard deviation of 15.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 98% of other flights.