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(UA) United Airlines 4066 On-Time Performance Rating

Date Range:

01-Aug-2026 to 30-Sep-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(RDU) Raleigh-Durham International Airport

Raleigh/Durham, NC, US

On-Time Performance Chart

(using rounded numbers)
On-Time
34
79%
Late
2
5%
Very Late
0
0%
Excessive
6
14%
Cancelled
0
0%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
42
Total Delays ( > 1 min )
14
Codeshares
42
Average Delay (min.)
40.857142857142854
Standard Deviation
41.2
Min
0
Max
140

UA 4066 On-Time Performance Details

Overall Rating
2.8 of 5
Average
Percentage On-Time 81%
Average Delay Time 40.857142857142854 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.8 shows that this flight has on-time performance characteristics better than 55% of all other flights in the FlightStats database.
On-Time Performance Rating
4.1 of 5
Good
Percentage On-Time 81%
This flight has an on-time performance of 81%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 82% of other flights.
Delay Performance
1.5 of 5
Poor
Average Delay Time 40.857142857142854 min
This flight has an average delay of 40.857142857142854 minutes with a standard deviation of 41.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 31% of other flights.

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