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(UA) United Airlines 1577 On-Time Performance Rating

Date Range:

15-Jul-2026 to 15-Sep-2026

(SFO) San Francisco International Airport

San Francisco, CA, US

(SEA) Seattle-Tacoma International Airport

Seattle, WA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
15
60%
Late
2
8%
Very Late
3
12%
Excessive
4
16%
Cancelled
1
4%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
25
Total Delays ( > 1 min )
10
Codeshares
0
Average Delay (min.)
46.9
Standard Deviation
31.6
Min
0
Max
109

UA 1577 On-Time Performance Details

Overall Rating
0.9 of 5
Poor
Percentage On-Time 60%
Average Delay Time 46.9 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.9 shows that this flight has on-time performance characteristics better than 16% of all other flights in the FlightStats database.
On-Time Performance Rating
0.3 of 5
Very Poor
Percentage On-Time 60%
This flight has an on-time performance of 60%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 7% of other flights.
Delay Performance
1.4 of 5
Poor
Average Delay Time 46.9 min
This flight has an average delay of 46.9 minutes with a standard deviation of 31.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 27% of other flights.

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