background

(UA) United Airlines 4390 On-Time Performance Rating

Date Range:

01-Sep-2026 to 31-Oct-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(MDT) Harrisburg International Airport

Middletown, PA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
15
83%
Late
2
11%
Very Late
1
6%
Excessive
0
0%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
18
Total Delays ( > 1 min )
5
Codeshares
18
Average Delay (min.)
15.4
Standard Deviation
10.4
Min
0
Max
31

UA 4390 On-Time Performance Details

Overall Rating
3.7 of 5
Good
Percentage On-Time 83%
Average Delay Time 15.4 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.7 shows that this flight has on-time performance characteristics better than 73% of all other flights in the FlightStats database.
On-Time Performance Rating
3.6 of 5
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 73% of other flights.
Delay Performance
3.8 of 5
Good
Average Delay Time 15.4 min
This flight has an average delay of 15.4 minutes with a standard deviation of 10.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 76% of other flights.

Other Stops for UA 4390