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(UA) United Airlines 4339 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(ROA) Roanoke-Blacksburg Regional Airport

Roanoke, VA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
34
74%
Late
3
7%
Very Late
2
4%
Excessive
6
13%
Cancelled
1
2%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
46
Total Delays ( > 1 min )
14
Codeshares
46
Average Delay (min.)
113.57142857142857
Standard Deviation
208.4
Min
0
Max
811

UA 4339 On-Time Performance Details

Overall Rating
0.8 of 5
Poor
Percentage On-Time 74%
Average Delay Time 113.57142857142857 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.8 shows that this flight has on-time performance characteristics better than 14% of all other flights in the FlightStats database.
On-Time Performance Rating
1.5 of 5
Poor
Percentage On-Time 74%
This flight has an on-time performance of 74%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 31% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 113.57142857142857 min
This flight has an average delay of 113.57142857142857 minutes with a standard deviation of 208.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.

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