(UA) United Airlines 4387 On-Time Performance Rating

Date Range:

01-Aug-2026 to 30-Sep-2026

(GSO) Piedmont Triad International Airport

Greensboro/High Point, NC, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)

On-Time

57%

Late

29%

Very Late

Excessive

14%

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

43.25

Standard Deviation

47.4

Min

Max

113

UA 4387 On-Time Performance Details

Overall Rating

1.2 of 5

Poor

Percentage On-Time 57%

Average Delay Time 43.25 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.2 shows that this flight has on-time performance characteristics better than 23% of all other flights in the FlightStats database.

On-Time Performance Rating

0.7 of 5

Poor

Percentage On-Time 57%

This flight has an on-time performance of 57%. 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

1.7 of 5

Average

Average Delay Time 43.25 min

This flight has an average delay of 43.25 minutes with a standard deviation of 47.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 34% of other flights.