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(UA) United Airlines 8581 On-Time Performance Rating

Date Range:

15-Apr-2026 to 15-Jun-2026

(LHR) London Heathrow Airport

London, EN, GB

(YVR) Vancouver International Airport

Vancouver, BC, CA

On-Time Performance Chart

(using rounded numbers)
On-Time
49
79%
Late
6
10%
Very Late
1
2%
Excessive
4
6%
Cancelled
1
2%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
61
Total Delays ( > 1 min )
26
Codeshares
61
Average Delay (min.)
17.96153846153846
Standard Deviation
25.6
Min
0
Max
114

UA 8581 On-Time Performance Details

Overall Rating
4.1 of 5
Good
Percentage On-Time 80%
Average Delay Time 17.96153846153846 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
3.6 of 5
Good
Percentage On-Time 80%
This flight has an on-time performance of 80%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 73% of other flights.
Delay Performance
4.6 of 5
Very Good
Average Delay Time 17.96153846153846 min
This flight has an average delay of 17.96153846153846 minutes with a standard deviation of 25.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 92% of other flights.