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(UA) United Airlines 4397 On-Time Performance Rating

Date Range:

15-Feb-2026 to 15-Apr-2026

(GRB) Green Bay Austin Straubel International Airport

Green Bay, WI, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
16
80%
Late
1
5%
Very Late
1
5%
Excessive
1
5%
Cancelled
0
0%
Diverted
1
5%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
19
Total Delays ( > 1 min )
7
Codeshares
19
Average Delay (min.)
19
Standard Deviation
19.8
Min
0
Max
56

UA 4397 On-Time Performance Details

Overall Rating
3.9 of 5
Good
Percentage On-Time 84%
Average Delay Time 19 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.9 shows that this flight has on-time performance characteristics better than 76% of all other flights in the FlightStats database.
On-Time Performance Rating
3.9 of 5
Good
Percentage On-Time 84%
This flight has an on-time performance of 84%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 79% of other flights.
Delay Performance
3.8 of 5
Good
Average Delay Time 19 min
This flight has an average delay of 19 minutes with a standard deviation of 19.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 76% of other flights.

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