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(UA) United Airlines 4866 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(ROA) Roanoke-Blacksburg Regional Airport

Roanoke, VA, US

(IAD) Washington Dulles International Airport

Dulles, VA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
4
44%
Late
0
0%
Very Late
1
11%
Excessive
3
33%
Cancelled
1
11%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
9
Total Delays ( > 1 min )
4
Codeshares
9
Average Delay (min.)
74.5
Standard Deviation
29.3
Min
0
Max
106

UA 4866 On-Time Performance Details

Overall Rating
0.2 of 5
Very Poor
Percentage On-Time 44%
Average Delay Time 74.5 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.2 shows that this flight has on-time performance characteristics better than 3% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 44%
This flight has an on-time performance of 44%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 1% of other flights.
Delay Performance
0.3 of 5
Very Poor
Average Delay Time 74.5 min
This flight has an average delay of 74.5 minutes with a standard deviation of 29.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 7% of other flights.