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(UA) United Airlines 591 On-Time Performance Rating

Date Range:

15-Jun-2026 to 15-Aug-2026

(EWR) Newark Liberty International Airport

Newark, NJ, US

(SAT) San Antonio International Airport

San Antonio, TX, US

On-Time Performance Chart

(using rounded numbers)
On-Time
34
77%
Late
1
2%
Very Late
3
7%
Excessive
6
14%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
44
Total Delays ( > 1 min )
11
Codeshares
0
Average Delay (min.)
63
Standard Deviation
43.8
Min
0
Max
145

UA 591 On-Time Performance Details

Overall Rating
2.3 of 5
Average
Percentage On-Time 77%
Average Delay Time 63 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.3 shows that this flight has on-time performance characteristics better than 44% of all other flights in the FlightStats database.
On-Time Performance Rating
4.1 of 5
Good
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 82% of other flights.
Delay Performance
0.4 of 5
Very Poor
Average Delay Time 63 min
This flight has an average delay of 63 minutes with a standard deviation of 43.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 8% of other flights.

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