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(DL) Delta Air Lines 21 On-Time Performance Rating

Date Range:

15-Feb-2025 to 15-Apr-2025

(LHR) London Heathrow Airport

London, EN, GB

(SEA) Seattle-Tacoma International Airport

Seattle, WA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
28
85%
Late
1
3%
Very Late
1
3%
Excessive
2
6%
Cancelled
1
3%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
33
Total Delays ( > 1 min )
5
Codeshares
0
Average Delay (min.)
44
Standard Deviation
32.2
Min
0
Max
81

DL 21 On-Time Performance Details

Overall Rating
2.8 of 5
Average
Percentage On-Time 85%
Average Delay Time 44 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.8 shows that this flight has on-time performance characteristics better than 54% of all other flights in the FlightStats database.
On-Time Performance Rating
4.1 of 5
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 82% of other flights.
Delay Performance
1.4 of 5
Poor
Average Delay Time 44 min
This flight has an average delay of 44 minutes with a standard deviation of 32.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 27% of other flights.