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(KE) Korean Air 3997 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(RDU) Raleigh-Durham International Airport

Raleigh/Durham, NC, US

(BOS) Boston Logan International Airport

Boston, MA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
49
83%
Late
3
5%
Very Late
0
0%
Excessive
2
3%
Cancelled
5
8%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
59
Total Delays ( > 1 min )
8
Codeshares
59
Average Delay (min.)
24.75
Standard Deviation
24.2
Min
0
Max
75

KE 3997 On-Time Performance Details

Overall Rating
4.1 of 5
Good
Percentage On-Time 83%
Average Delay Time 24.75 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.1 shows that this flight has on-time performance characteristics better than 81% of all other flights in the FlightStats database.
On-Time Performance Rating
4.7 of 5
Very Good
Percentage On-Time 83%
This flight has an on-time performance of 83%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 93% of other flights.
Delay Performance
3.5 of 5
Average
Average Delay Time 24.75 min
This flight has an average delay of 24.75 minutes with a standard deviation of 24.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 69% of other flights.