background

(UA) United Airlines 9851 On-Time Performance Rating

Date Range:

15-Mar-2026 to 15-May-2026

(VIE) Vienna International Airport

Vienna, AT

(ATH) Athens Eleftherios Venizelos International Airport

Athens, GR

On-Time Performance Chart

(using rounded numbers)
On-Time
49
80%
Late
7
11%
Very Late
3
5%
Excessive
2
3%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
61
Total Delays ( > 1 min )
41
Codeshares
61
Average Delay (min.)
12.487804878048781
Standard Deviation
13.9
Min
0
Max
64

UA 9851 On-Time Performance Details

Overall Rating
4.0 of 5
Good
Percentage On-Time 80%
Average Delay Time 12.487804878048781 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4 shows that this flight has on-time performance characteristics better than 79% of all other flights in the FlightStats database.
On-Time Performance Rating
3.1 of 5
Average
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 62% of other flights.
Delay Performance
4.9 of 5
Very Good
Average Delay Time 12.487804878048781 min
This flight has an average delay of 12.487804878048781 minutes with a standard deviation of 13.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 98% of other flights.