background

(DL) Delta Air Lines 4027 On-Time Performance Rating

Date Range:

15-Mar-2026 to 15-May-2026

(SEA) Seattle-Tacoma International Airport

Seattle, WA, US

(ONT) Ontario International Airport

Ontario, CA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
25
89%
Late
1
4%
Very Late
1
4%
Excessive
1
4%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
28
Total Delays ( > 1 min )
11
Codeshares
28
Average Delay (min.)
19.272727272727273
Standard Deviation
25.7
Min
0
Max
92

DL 4027 On-Time Performance Details

Overall Rating
4.2 of 5
Good
Percentage On-Time 89%
Average Delay Time 19.272727272727273 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 83% of all other flights in the FlightStats database.
On-Time Performance Rating
4.6 of 5
Very Good
Percentage On-Time 89%
This flight has an on-time performance of 89%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 92% of other flights.
Delay Performance
3.8 of 5
Good
Average Delay Time 19.272727272727273 min
This flight has an average delay of 19.272727272727273 minutes with a standard deviation of 25.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 76% of other flights.

Other Stops for DL 4027