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(UA) United Airlines 1577 On-Time Performance Rating

Date Range:

15-Jul-2026 to 15-Sep-2026

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

(SFO) San Francisco International Airport

San Francisco, CA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
37
65%
Late
6
11%
Very Late
2
4%
Excessive
11
19%
Cancelled
0
0%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
56
Total Delays ( > 1 min )
26
Codeshares
0
Average Delay (min.)
59.69230769230769
Standard Deviation
90.3
Min
0
Max
459

UA 1577 On-Time Performance Details

Overall Rating
0.4 of 5
Very Poor
Percentage On-Time 66%
Average Delay Time 59.69230769230769 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.4 shows that this flight has on-time performance characteristics better than 6% of all other flights in the FlightStats database.
On-Time Performance Rating
0.6 of 5
Poor
Percentage On-Time 66%
This flight has an on-time performance of 66%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 12% of other flights.
Delay Performance
0.1 of 5
Very Poor
Average Delay Time 59.69230769230769 min
This flight has an average delay of 59.69230769230769 minutes with a standard deviation of 90.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 2% of other flights.

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