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(DL) Delta Air Lines 637 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(CHA) Chattanooga Metropolitan Airport

Chattanooga, TN, US

(ATL) Atlanta Hartsfield-Jackson International Airport

Atlanta, GA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
18
78%
Late
0
0%
Very Late
1
4%
Excessive
3
13%
Cancelled
1
4%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
23
Total Delays ( > 1 min )
7
Codeshares
0
Average Delay (min.)
79.42857142857143
Standard Deviation
121.5
Min
0
Max
339

DL 637 On-Time Performance Details

Overall Rating
1.5 of 5
Poor
Percentage On-Time 78%
Average Delay Time 79.42857142857143 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.5 shows that this flight has on-time performance characteristics better than 29% of all other flights in the FlightStats database.
On-Time Performance Rating
2.9 of 5
Average
Percentage On-Time 78%
This flight has an on-time performance of 78%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 58% of other flights.
Delay Performance
0.1 of 5
Very Poor
Average Delay Time 79.42857142857143 min
This flight has an average delay of 79.42857142857143 minutes with a standard deviation of 121.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 2% of other flights.

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