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(UA) United Airlines 4959 On-Time Performance Rating

Date Range:

15-Mar-2026 to 15-May-2026

(GSP) Greenville-Spartanburg International Airport

Greenville, SC, US

(IAD) Washington Dulles International Airport

Dulles, VA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
40
75%
Late
3
6%
Very Late
1
2%
Excessive
7
13%
Cancelled
1
2%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
52
Total Delays ( > 1 min )
13
Codeshares
52
Average Delay (min.)
81.07692307692308
Standard Deviation
96.7
Min
0
Max
349

UA 4959 On-Time Performance Details

Overall Rating
0.8 of 5
Poor
Percentage On-Time 77%
Average Delay Time 81.07692307692308 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 77%
This flight has an on-time performance of 77%. 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 81.07692307692308 min
This flight has an average delay of 81.07692307692308 minutes with a standard deviation of 96.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.