(UA) United Airlines 520 On-Time Performance Rating

Date Range:

01-Dec-2025 to 31-Jan-2026

(MIA) Miami International Airport

Miami, FL, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)

On-Time

94%

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.)

6.666666666666667

Standard Deviation

4.8

Min

Max

UA 520 On-Time Performance Details

Overall Rating

4.7 of 5

Very Good

Percentage On-Time 94%

Average Delay Time 6.666666666666667 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.7 shows that this flight has on-time performance characteristics better than 92% of all other flights in the FlightStats database.

On-Time Performance Rating

4.9 of 5

Very Good

Percentage On-Time 94%

This flight has an on-time performance of 94%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 98% of other flights.

Delay Performance

4.4 of 5

Good

Average Delay Time 6.666666666666667 min

This flight has an average delay of 6.666666666666667 minutes with a standard deviation of 4.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 88% of other flights.