(UA) United Airlines 520 On-Time Performance Rating

Date Range:

01-Dec-2025 to 31-Jan-2026

(SFO) San Francisco International Airport

San Francisco, CA, US

(PHX) Phoenix Sky Harbor International Airport

Phoenix, AZ, US

On-Time Performance Chart

(using rounded numbers)

On-Time

88%

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.)

13.714285714285714

Standard Deviation

13.5

Min

Max

UA 520 On-Time Performance Details

Overall Rating

4.5 of 5

Good

Percentage On-Time 89%

Average Delay Time 13.714285714285714 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.5 shows that this flight has on-time performance characteristics better than 89% of all other flights in the FlightStats database.

On-Time Performance Rating

4.8 of 5

Very Good

Percentage On-Time 89%

This flight has an on-time performance of 89%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 96% of other flights.

Delay Performance

4.2 of 5

Good

Average Delay Time 13.714285714285714 min

This flight has an average delay of 13.714285714285714 minutes with a standard deviation of 13.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 84% of other flights.