(UA) United Airlines 520 On-Time Performance Rating

Date Range:

01-Dec-2025 to 31-Jan-2026

(PHX) Phoenix Sky Harbor International Airport

Phoenix, AZ, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)

On-Time

64%

Late

12%

Very Late

Excessive

17%

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

37.892857142857146

Standard Deviation

57.9

Min

Max

256

UA 520 On-Time Performance Details

Overall Rating

1.4 of 5

Poor

Percentage On-Time 66%

Average Delay Time 37.892857142857146 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.4 shows that this flight has on-time performance characteristics better than 27% of all other flights in the FlightStats database.

On-Time Performance Rating

0.7 of 5

Poor

Percentage On-Time 66%

This flight has an on-time performance of 66%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 14% of other flights.

Delay Performance

2.1 of 5

Average

Average Delay Time 37.892857142857146 min

This flight has an average delay of 37.892857142857146 minutes with a standard deviation of 57.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 42% of other flights.