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(DL) Delta Air Lines 4139 On-Time Performance Rating

Date Range:

15-Dec-2025 to 15-Feb-2026

(FAT) Fresno Yosemite International Airport

Fresno, CA, US

(SLC) Salt Lake City International Airport

Salt Lake City, UT, US

On-Time Performance Chart

(using rounded numbers)
On-Time
10
83%
Late
1
8%
Very Late
0
0%
Excessive
1
8%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
12
Total Delays ( > 1 min )
3
Codeshares
12
Average Delay (min.)
54.666666666666664
Standard Deviation
66
Min
0
Max
130

DL 4139 On-Time Performance Details

Overall Rating
2.5 of 5
Average
Percentage On-Time 83%
Average Delay Time 54.666666666666664 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.5 shows that this flight has on-time performance characteristics better than 49% of all other flights in the FlightStats database.
On-Time Performance Rating
3.8 of 5
Good
Percentage On-Time 83%
This flight has an on-time performance of 83%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 76% of other flights.
Delay Performance
1.2 of 5
Poor
Average Delay Time 54.666666666666664 min
This flight has an average delay of 54.666666666666664 minutes with a standard deviation of 66 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 24% of other flights.

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