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(DL) Delta Air Lines 2421 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(SLC) Salt Lake City International Airport

Salt Lake City, UT, US

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

On-Time Performance Chart

(using rounded numbers)
On-Time
23
79%
Late
2
7%
Very Late
2
7%
Excessive
1
3%
Cancelled
1
3%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
29
Total Delays ( > 1 min )
6
Codeshares
0
Average Delay (min.)
38.5
Standard Deviation
39.1
Min
0
Max
117

DL 2421 On-Time Performance Details

Overall Rating
2.7 of 5
Average
Percentage On-Time 79%
Average Delay Time 38.5 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.7 shows that this flight has on-time performance characteristics better than 53% of all other flights in the FlightStats database.
On-Time Performance Rating
3.5 of 5
Average
Percentage On-Time 79%
This flight has an on-time performance of 79%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 69% of other flights.
Delay Performance
1.9 of 5
Average
Average Delay Time 38.5 min
This flight has an average delay of 38.5 minutes with a standard deviation of 39.1 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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