background

(UA) United Airlines 4639 On-Time Performance Rating

Date Range:

15-May-2026 to 15-Jul-2026

(ATW) Appleton International Airport

Appleton, WI, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
17
81%
Late
0
0%
Very Late
1
5%
Excessive
3
14%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
21
Total Delays ( > 1 min )
8
Codeshares
21
Average Delay (min.)
115.375
Standard Deviation
157.7
Min
0
Max
374

UA 4639 On-Time Performance Details

Overall Rating
1.9 of 5
Average
Percentage On-Time 81%
Average Delay Time 115.375 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.9 shows that this flight has on-time performance characteristics better than 37% of all other flights in the FlightStats database.
On-Time Performance Rating
3.8 of 5
Good
Percentage On-Time 81%
This flight has an on-time performance of 81%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 76% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 115.375 min
This flight has an average delay of 115.375 minutes with a standard deviation of 157.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.

Other Stops for UA 4639