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(UA) United Airlines 4381 On-Time Performance Rating

Date Range:

01-May-2026 to 30-Jun-2026

(BUF) Buffalo Niagara International Airport

Buffalo, NY, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
44
73%
Late
5
8%
Very Late
0
0%
Excessive
8
13%
Cancelled
3
5%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
60
Total Delays ( > 1 min )
24
Codeshares
60
Average Delay (min.)
55.916666666666664
Standard Deviation
90.4
Min
0
Max
344

UA 4381 On-Time Performance Details

Overall Rating
0.6 of 5
Poor
Percentage On-Time 73%
Average Delay Time 55.916666666666664 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.6 shows that this flight has on-time performance characteristics better than 11% of all other flights in the FlightStats database.
On-Time Performance Rating
1.1 of 5
Poor
Percentage On-Time 73%
This flight has an on-time performance of 73%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 21% of other flights.
Delay Performance
0.1 of 5
Very Poor
Average Delay Time 55.916666666666664 min
This flight has an average delay of 55.916666666666664 minutes with a standard deviation of 90.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 3% of other flights.