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(UA) United Airlines 4059 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(SBN) South Bend International Airport

South Bend, IN, US

On-Time Performance Chart

(using rounded numbers)
On-Time
21
72%
Late
0
0%
Very Late
0
0%
Excessive
7
24%
Cancelled
1
3%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
29
Total Delays ( > 1 min )
10
Codeshares
29
Average Delay (min.)
64.6
Standard Deviation
52.8
Min
0
Max
147

UA 4059 On-Time Performance Details

Overall Rating
0.9 of 5
Poor
Percentage On-Time 72%
Average Delay Time 64.6 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.9 shows that this flight has on-time performance characteristics better than 16% of all other flights in the FlightStats database.
On-Time Performance Rating
1.5 of 5
Poor
Percentage On-Time 72%
This flight has an on-time performance of 72%. 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
0.2 of 5
Very Poor
Average Delay Time 64.6 min
This flight has an average delay of 64.6 minutes with a standard deviation of 52.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 4% of other flights.

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