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(UA) United Airlines 1251 On-Time Performance Rating

Date Range:

15-Aug-2026 to 15-Oct-2026

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
3
43%
Late
2
29%
Very Late
2
29%
Excessive
0
0%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
7
Total Delays ( > 1 min )
7
Codeshares
0
Average Delay (min.)
20.428571428571427
Standard Deviation
14.8
Min
1
Max
42

UA 1251 On-Time Performance Details

Overall Rating
1.8 of 5
Average
Percentage On-Time 43%
Average Delay Time 20.428571428571427 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.8 shows that this flight has on-time performance characteristics better than 35% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 43%
This flight has an on-time performance of 43%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 1% of other flights.
Delay Performance
3.5 of 5
Average
Average Delay Time 20.428571428571427 min
This flight has an average delay of 20.428571428571427 minutes with a standard deviation of 14.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 69% of other flights.

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