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(UA) United Airlines 4425 On-Time Performance Rating

Date Range:

01-Jun-2026 to 31-Jul-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

On-Time Performance Chart

(using rounded numbers)
On-Time
39
83%
Late
1
2%
Very Late
0
0%
Excessive
6
13%
Cancelled
1
2%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
47
Total Delays ( > 1 min )
11
Codeshares
47
Average Delay (min.)
129.0909090909091
Standard Deviation
219.9
Min
0
Max
763

UA 4425 On-Time Performance Details

Overall Rating
2.4 of 5
Average
Percentage On-Time 83%
Average Delay Time 129.0909090909091 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.4 shows that this flight has on-time performance characteristics better than 47% of all other flights in the FlightStats database.
On-Time Performance Rating
4.8 of 5
Very Good
Percentage On-Time 83%
This flight has an on-time performance of 83%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 96% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 129.0909090909091 min
This flight has an average delay of 129.0909090909091 minutes with a standard deviation of 219.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.

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