(UA) United Airlines 591 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-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

85%

Late

Very Late

Excessive

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

11.714285714285714

Standard Deviation

12.1

Min

Max

UA 591 On-Time Performance Details

Overall Rating

4.3 of 5

Good

Percentage On-Time 85%

Average Delay Time 11.714285714285714 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.3 shows that this flight has on-time performance characteristics better than 85% of all other flights in the FlightStats database.

On-Time Performance Rating

4.4 of 5

Good

Percentage On-Time 85%

This flight has an on-time performance of 85%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 88% of other flights.

Delay Performance

4.2 of 5

Good

Average Delay Time 11.714285714285714 min

This flight has an average delay of 11.714285714285714 minutes with a standard deviation of 12.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 84% of other flights.