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(UA) United Airlines 439 On-Time Performance Rating

Date Range:

15-Mar-2026 to 15-May-2026

(SFO) San Francisco International Airport

San Francisco, CA, US

(AUS) Austin-Bergstrom International Airport

Austin, TX, US

On-Time Performance Chart

(using rounded numbers)
On-Time
2
50%
Late
1
25%
Very Late
0
0%
Excessive
1
25%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
4
Total Delays ( > 1 min )
2
Codeshares
0
Average Delay (min.)
41
Standard Deviation
21.2
Min
0
Max
56

UA 439 On-Time Performance Details

Overall Rating
1.1 of 5
Poor
Percentage On-Time 50%
Average Delay Time 41 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.1 shows that this flight has on-time performance characteristics better than 21% of all other flights in the FlightStats database.
On-Time Performance Rating
0.3 of 5
Very 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 7% of other flights.
Delay Performance
1.9 of 5
Average
Average Delay Time 41 min
This flight has an average delay of 41 minutes with a standard deviation of 21.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 38% of other flights.

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