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(UA) United Airlines 4451 On-Time Performance Rating

Date Range:

15-Mar-2026 to 15-May-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(YOW) Ottawa Macdonald-Cartier International Airport

Ottawa, ON, CA

On-Time Performance Chart

(using rounded numbers)
On-Time
52
81%
Late
5
8%
Very Late
2
3%
Excessive
1
2%
Cancelled
0
0%
Diverted
4
6%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
60
Total Delays ( > 1 min )
14
Codeshares
60
Average Delay (min.)
24.357142857142858
Standard Deviation
34.9
Min
0
Max
141

UA 4451 On-Time Performance Details

Overall Rating
4.1 of 5
Good
Percentage On-Time 87%
Average Delay Time 24.357142857142858 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.1 shows that this flight has on-time performance characteristics better than 81% of all other flights in the FlightStats database.
On-Time Performance Rating
4.7 of 5
Very Good
Percentage On-Time 87%
This flight has an on-time performance of 87%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 93% of other flights.
Delay Performance
3.5 of 5
Average
Average Delay Time 24.357142857142858 min
This flight has an average delay of 24.357142857142858 minutes with a standard deviation of 34.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 69% of other flights.