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(UA) United Airlines 577 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(SFO) San Francisco International Airport

San Francisco, CA, US

(DTW) Detroit Metropolitan Wayne County Airport

Detroit, MI, US

On-Time Performance Chart

(using rounded numbers)
On-Time
1
50%
Late
0
0%
Very Late
0
0%
Excessive
1
50%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
2
Total Delays ( > 1 min )
1
Codeshares
0
Average Delay (min.)
114
Standard Deviation
0
Min
0
Max
114

UA 577 On-Time Performance Details

Overall Rating
0.7 of 5
Poor
Percentage On-Time 50%
Average Delay Time 114 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 50%
This flight has an on-time performance of 50%. 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 114 min
This flight has an average delay of 114 minutes with a standard deviation of 0 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 8% of other flights.

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