background

(UA) United Airlines 4508 On-Time Performance Rating

Date Range:

15-Mar-2026 to 15-May-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(PWM) Portland International Jetport

Portland, ME, US

On-Time Performance Chart

(using rounded numbers)
On-Time
27
82%
Late
2
6%
Very Late
1
3%
Excessive
2
6%
Cancelled
0
0%
Diverted
1
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
32
Total Delays ( > 1 min )
8
Codeshares
32
Average Delay (min.)
50.5
Standard Deviation
66.7
Min
0
Max
194

UA 4508 On-Time Performance Details

Overall Rating
2.4 of 5
Average
Percentage On-Time 84%
Average Delay Time 50.5 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 46% of all other flights in the FlightStats database.
On-Time Performance Rating
3.9 of 5
Good
Percentage On-Time 84%
This flight has an on-time performance of 84%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 79% of other flights.
Delay Performance
0.8 of 5
Poor
Average Delay Time 50.5 min
This flight has an average delay of 50.5 minutes with a standard deviation of 66.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 16% of other flights.

Other Stops for UA 4508