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(DL) Delta Air Lines 4939 On-Time Performance Rating

Date Range:

15-Dec-2025 to 15-Feb-2026

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

(LGA) New York LaGuardia Airport

New York, NY, US

On-Time Performance Chart

(using rounded numbers)
On-Time
41
85%
Late
2
4%
Very Late
0
0%
Excessive
1
2%
Cancelled
4
8%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
48
Total Delays ( > 1 min )
6
Codeshares
48
Average Delay (min.)
22.666666666666668
Standard Deviation
29.3
Min
0
Max
80

DL 4939 On-Time Performance Details

Overall Rating
4.2 of 5
Good
Percentage On-Time 85%
Average Delay Time 22.666666666666668 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.2 shows that this flight has on-time performance characteristics better than 82% of all other flights in the FlightStats database.
On-Time Performance Rating
4.8 of 5
Very Good
Percentage On-Time 85%
This flight has an on-time performance of 85%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 96% of other flights.
Delay Performance
3.5 of 5
Average
Average Delay Time 22.666666666666668 min
This flight has an average delay of 22.666666666666668 minutes with a standard deviation of 29.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 69% of other flights.

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