(UA) United Airlines 1511 On-Time Performance Rating

Date Range:

15-Feb-2026 to 15-Apr-2026

(MIA) Miami International Airport

Miami, FL, US

(SFO) San Francisco International Airport

San Francisco, CA, US

On-Time Performance Chart

(using rounded numbers)

On-Time

40%

Late

27%

Very Late

13%

Excessive

20%

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

41.4

Standard Deviation

Min

Max

132

UA 1511 On-Time Performance Details

Overall Rating

0.8 of 5

Poor

Percentage On-Time 40%

Average Delay Time 41.4 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

0.0 of 5

Very Poor

Percentage On-Time 40%

This flight has an on-time performance of 40%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 0% of other flights.

Delay Performance

1.5 of 5

Poor

Average Delay Time 41.4 min

This flight has an average delay of 41.4 minutes with a standard deviation of 37 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 31% of other flights.