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(UA) United Airlines 4491 On-Time Performance Rating

Date Range:

01-Jul-2026 to 31-Aug-2026

(EWR) Newark Liberty International Airport

Newark, NJ, US

(ACK) Nantucket Memorial Airport

Nantucket, MA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
44
75%
Late
1
2%
Very Late
1
2%
Excessive
7
12%
Cancelled
6
10%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
59
Total Delays ( > 1 min )
11
Codeshares
59
Average Delay (min.)
88.0909090909091
Standard Deviation
69.9
Min
0
Max
196

UA 4491 On-Time Performance Details

Overall Rating
1.8 of 5
Average
Percentage On-Time 75%
Average Delay Time 88.0909090909091 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.8 shows that this flight has on-time performance characteristics better than 34% of all other flights in the FlightStats database.
On-Time Performance Rating
3.5 of 5
Average
Percentage On-Time 75%
This flight has an on-time performance of 75%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 69% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 88.0909090909091 min
This flight has an average delay of 88.0909090909091 minutes with a standard deviation of 69.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.