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(UA) United Airlines 1129 On-Time Performance Rating

Date Range:

01-Oct-2025 to 30-Nov-2025

(IAD) Washington Dulles International Airport

Dulles, VA, US

(SFO) San Francisco International Airport

San Francisco, CA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
36
75%
Late
4
8%
Very Late
3
6%
Excessive
5
10%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
48
Total Delays ( > 1 min )
19
Codeshares
0
Average Delay (min.)
38.26315789473684
Standard Deviation
42.8
Min
0
Max
179

UA 1129 On-Time Performance Details

Overall Rating
1.5 of 5
Poor
Percentage On-Time 75%
Average Delay Time 38.26315789473684 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.5 shows that this flight has on-time performance characteristics better than 28% of all other flights in the FlightStats database.
On-Time Performance Rating
1.7 of 5
Average
Percentage On-Time 75%
This flight has an on-time performance of 75%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 34% of other flights.
Delay Performance
1.2 of 5
Poor
Average Delay Time 38.26315789473684 min
This flight has an average delay of 38.26315789473684 minutes with a standard deviation of 42.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 24% of other flights.