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(DL) Delta Air Lines 631 On-Time Performance Rating

Date Range:

01-Aug-2026 to 30-Sep-2026

(SFO) San Francisco International Airport

San Francisco, CA, US

(JFK) New York John F. Kennedy International Airport

New York, NY, US

On-Time Performance Chart

(using rounded numbers)
On-Time
11
52%
Late
4
19%
Very Late
4
19%
Excessive
1
5%
Cancelled
0
0%
Diverted
1
5%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
20
Total Delays ( > 1 min )
13
Codeshares
0
Average Delay (min.)
28.153846153846153
Standard Deviation
19.2
Min
0
Max
80

DL 631 On-Time Performance Details

Overall Rating
1.7 of 5
Average
Percentage On-Time 55%
Average Delay Time 28.153846153846153 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.7 shows that this flight has on-time performance characteristics better than 33% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 55%
This flight has an on-time performance of 55%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 2% of other flights.
Delay Performance
3.3 of 5
Average
Average Delay Time 28.153846153846153 min
This flight has an average delay of 28.153846153846153 minutes with a standard deviation of 19.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 66% of other flights.