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(UA) United Airlines 4459 On-Time Performance Rating

Date Range:

01-Mar-2026 to 30-Apr-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
2
67%
Late
0
0%
Very Late
0
0%
Excessive
0
0%
Cancelled
0
0%
Diverted
1
33%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
2
Total Delays ( > 1 min )
0
Codeshares
2
Average Delay (min.)
0
Standard Deviation
0
Min
0
Max
0

UA 4459 On-Time Performance Details

Overall Rating
3.2 of 5
Average
Percentage On-Time 100%
Average Delay Time 0 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.2 shows that this flight has on-time performance characteristics better than 63% of all other flights in the FlightStats database.
On-Time Performance Rating
3.9 of 5
Good
Percentage On-Time 100%
This flight has an on-time performance of 100%. 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
2.5 of 5
Average
Average Delay Time 0 min
This flight has an average delay of 0 minutes with a standard deviation of 0 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 50% of other flights.

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