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(UA) United Airlines 1236 On-Time Performance Rating

Date Range:

15-Feb-2026 to 15-Apr-2026

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

(DEN) Denver International Airport

Denver, CO, US

On-Time Performance Chart

(using rounded numbers)
On-Time
27
82%
Late
1
3%
Very Late
1
3%
Excessive
4
12%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
33
Total Delays ( > 1 min )
13
Codeshares
0
Average Delay (min.)
58.46153846153846
Standard Deviation
99.7
Min
0
Max
298

UA 1236 On-Time Performance Details

Overall Rating
2.1 of 5
Average
Percentage On-Time 82%
Average Delay Time 58.46153846153846 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.1 shows that this flight has on-time performance characteristics better than 40% of all other flights in the FlightStats database.
On-Time Performance Rating
3.8 of 5
Good
Percentage On-Time 82%
This flight has an on-time performance of 82%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 76% of other flights.
Delay Performance
0.3 of 5
Very Poor
Average Delay Time 58.46153846153846 min
This flight has an average delay of 58.46153846153846 minutes with a standard deviation of 99.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 5% of other flights.

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