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(DL) Delta Air Lines 4028 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(SLC) Salt Lake City International Airport

Salt Lake City, UT, US

(BOI) Boise Air Terminal

Boise, ID, US

On-Time Performance Chart

(using rounded numbers)
On-Time
48
91%
Late
3
6%
Very Late
0
0%
Excessive
2
4%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
53
Total Delays ( > 1 min )
12
Codeshares
53
Average Delay (min.)
23.083333333333332
Standard Deviation
30.2
Min
0
Max
109

DL 4028 On-Time Performance Details

Overall Rating
4.3 of 5
Good
Percentage On-Time 91%
Average Delay Time 23.083333333333332 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.3 shows that this flight has on-time performance characteristics better than 85% of all other flights in the FlightStats database.
On-Time Performance Rating
5.0 of 5
Very Good
Percentage On-Time 91%
This flight has an on-time performance of 91%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 100% of other flights.
Delay Performance
3.6 of 5
Good
Average Delay Time 23.083333333333332 min
This flight has an average delay of 23.083333333333332 minutes with a standard deviation of 30.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 73% of other flights.

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