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(UA) United Airlines 521 On-Time Performance Rating

Date Range:

15-Aug-2025 to 15-Oct-2025

(BOS) Boston Logan International Airport

Boston, MA, US

(EWR) Newark Liberty International Airport

Newark, NJ, US

On-Time Performance Chart

(using rounded numbers)
On-Time
17
35%
Late
5
10%
Very Late
3
6%
Excessive
21
43%
Cancelled
2
4%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
48
Total Delays ( > 1 min )
35
Codeshares
0
Average Delay (min.)
73.25714285714285
Standard Deviation
66.8
Min
0
Max
278

UA 521 On-Time Performance Details

Overall Rating
0.0 of 5
Very Poor
Percentage On-Time 35%
Average Delay Time 73.25714285714285 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0 shows that this flight has on-time performance characteristics better than 0% of all other flights in the FlightStats database.
On-Time Performance Rating
0.0 of 5
Very Poor
Percentage On-Time 35%
This flight has an on-time performance of 35%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 0% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 73.25714285714285 min
This flight has an average delay of 73.25714285714285 minutes with a standard deviation of 66.8 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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