background

(UA) United Airlines 1577 On-Time Performance Rating

Date Range:

15-May-2026 to 15-Jul-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
40
68%
Late
4
7%
Very Late
1
2%
Excessive
12
20%
Cancelled
0
0%
Diverted
2
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
57
Total Delays ( > 1 min )
30
Codeshares
0
Average Delay (min.)
51.3
Standard Deviation
78.7
Min
0
Max
390

UA 1577 On-Time Performance Details

Overall Rating
0.7 of 5
Poor
Percentage On-Time 70%
Average Delay Time 51.3 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.7 shows that this flight has on-time performance characteristics better than 12% of all other flights in the FlightStats database.
On-Time Performance Rating
0.9 of 5
Poor
Percentage On-Time 70%
This flight has an on-time performance of 70%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 18% of other flights.
Delay Performance
0.4 of 5
Very Poor
Average Delay Time 51.3 min
This flight has an average delay of 51.3 minutes with a standard deviation of 78.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 8% of other flights.

Other Stops for UA 1577