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(UA) United Airlines 4381 On-Time Performance Rating

Date Range:

15-Mar-2026 to 15-May-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
34
74%
Late
2
4%
Very Late
0
0%
Excessive
10
22%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
46
Total Delays ( > 1 min )
21
Codeshares
46
Average Delay (min.)
72.66666666666667
Standard Deviation
87.1
Min
0
Max
304

UA 4381 On-Time Performance Details

Overall Rating
0.5 of 5
Very Poor
Percentage On-Time 74%
Average Delay Time 72.66666666666667 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.5 shows that this flight has on-time performance characteristics better than 8% of all other flights in the FlightStats database.
On-Time Performance Rating
0.9 of 5
Poor
Percentage On-Time 74%
This flight has an on-time performance of 74%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 18% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 72.66666666666667 min
This flight has an average delay of 72.66666666666667 minutes with a standard deviation of 87.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.

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