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(UA) United Airlines 4599 On-Time Performance Rating

Date Range:

15-Aug-2026 to 15-Oct-2026

(RDU) Raleigh-Durham International Airport

Raleigh/Durham, NC, US

(IAD) Washington Dulles International Airport

Dulles, VA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
6
75%
Late
1
13%
Very Late
0
0%
Excessive
0
0%
Cancelled
1
13%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
8
Total Delays ( > 1 min )
2
Codeshares
8
Average Delay (min.)
10
Standard Deviation
12.7
Min
0
Max
19

UA 4599 On-Time Performance Details

Overall Rating
2.9 of 5
Average
Percentage On-Time 75%
Average Delay Time 10 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.9 shows that this flight has on-time performance characteristics better than 56% of all other flights in the FlightStats database.
On-Time Performance Rating
2.1 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 42% of other flights.
Delay Performance
3.6 of 5
Good
Average Delay Time 10 min
This flight has an average delay of 10 minutes with a standard deviation of 12.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 73% of other flights.

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