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(UA) United Airlines 3521 On-Time Performance Rating

Date Range:

01-Jul-2026 to 31-Aug-2026

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

(YUL) Montreal-Trudeau International Airport

Montreal, QC, CA

On-Time Performance Chart

(using rounded numbers)
On-Time
15
71%
Late
1
5%
Very Late
0
0%
Excessive
5
24%
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.)
119.25
Standard Deviation
100.9
Min
0
Max
281

UA 3521 On-Time Performance Details

Overall Rating
1.2 of 5
Poor
Percentage On-Time 71%
Average Delay Time 119.25 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.2 shows that this flight has on-time performance characteristics better than 22% of all other flights in the FlightStats database.
On-Time Performance Rating
2.3 of 5
Average
Percentage On-Time 71%
This flight has an on-time performance of 71%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 46% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 119.25 min
This flight has an average delay of 119.25 minutes with a standard deviation of 100.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.

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