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(UA) United Airlines 1577 On-Time Performance Rating

Date Range:

15-May-2026 to 15-Jul-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
38
69%
Late
8
15%
Very Late
2
4%
Excessive
6
11%
Cancelled
0
0%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
54
Total Delays ( > 1 min )
27
Codeshares
0
Average Delay (min.)
36.03703703703704
Standard Deviation
44.6
Min
0
Max
190

UA 1577 On-Time Performance Details

Overall Rating
1.7 of 5
Average
Percentage On-Time 70%
Average Delay Time 36.03703703703704 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.7 shows that this flight has on-time performance characteristics better than 33% of all other flights in the FlightStats database.
On-Time Performance Rating
1.1 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 21% of other flights.
Delay Performance
2.3 of 5
Average
Average Delay Time 36.03703703703704 min
This flight has an average delay of 36.03703703703704 minutes with a standard deviation of 44.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 46% of other flights.

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