Air Seoul Delay Rate, Cancellations & On-Time Performance RS

On-time departure and arrival rates compiled from operational records, covering every flight operated to and from Japan. Switch the period with the tabs below.

Delay rate 18% Delay rate is the share of flights departing more than 15 minutes after schedule (100% − on-time departure)

Cancellation: 0.2% / Avg delay when late: 99min

Last 28 days ・ 473 flights ・ Includes estimates 2 estimated

Some airlines do not publish gate departure/arrival times. For those flights we estimate the gate times from the takeoff/landing record and the airport's measured taxi times (validated at 3.5 min mean error, 94.4% agreement on the on-time call). Without the estimate, those airlines' flights would drop out of the sample entirely and cross-airline comparison would break.

DailyWeeklyMonthly

Daily · Last 30 days

On-time departureOn timeDelayed

20%40%60%80%100%020 93.8%31.3%81.3%2026-09-0616 flights ・ Avg delay when late +38minOn time 13 ・ Delayed 333.3%2026-09-0718 flights ・ Avg delay when late +50minOn time 6 ・ Delayed 1288.2%2026-09-0817 flights ・ Avg delay when late +28minOn time 15 ・ Delayed 266.7%2026-09-0918 flights ・ Avg delay when late +24minOn time 12 ・ Delayed 668.8%2026-09-1016 flights ・ Avg delay when late +39minOn time 11 ・ Delayed 576.5%2026-09-1117 flights ・ Avg delay when late +60minOn time 13 ・ Delayed 450%2026-09-1218 flights ・ Avg delay when late +192minOn time 9 ・ Delayed 931.6%2026-09-1319 flights ・ Avg delay when late +202minOn time 6 ・ Delayed 1331.3%2026-09-1416 flights ・ Avg delay when late +161minOn time 5 ・ Delayed 1153.8%2026-09-1513 flights ・ Avg delay when late +125minOn time 7 ・ Delayed 6100%2026-09-1618 flightsOn time 18 ・ Delayed 087.5%2026-09-1716 flights ・ Avg delay when late +26minOn time 14 ・ Delayed 294.4%2026-09-1818 flights ・ Avg delay when late +17minOn time 17 ・ Delayed 194.1%2026-09-1917 flights ・ Avg delay when late +17minOn time 16 ・ Delayed 1100%2026-09-2020 flightsOn time 20 ・ Delayed 087.5%2026-09-2116 flights ・ Avg delay when late +21minOn time 14 ・ Delayed 276.5%2026-09-2217 flights ・ Avg delay when late +29minOn time 13 ・ Delayed 483.3%2026-09-2318 flights ・ Avg delay when late +38minOn time 15 ・ Delayed 3100%2026-09-2416 flightsOn time 16 ・ Delayed 075%2026-09-2520 flights ・ Avg delay when late +56minOn time 15 ・ Delayed 588.2%2026-09-2617 flights ・ Avg delay when late +20minOn time 15 ・ Delayed 295%2026-09-2720 flights ・ Avg delay when late +25minOn time 19 ・ Delayed 188.9%2026-09-2818 flights ・ Avg delay when late +21minOn time 16 ・ Delayed 2100%2026-09-2917 flightsOn time 17 ・ Delayed 094.4%2026-09-3018 flights ・ Avg delay when late +19minOn time 17 ・ Delayed 181.3%2026-10-0116 flights ・ Avg delay when late +28minOn time 13 ・ Delayed 3100%2026-10-0220 flightsOn time 20 ・ Delayed 094.1%2026-10-0317 flights ・ Avg delay when late +16minOn time 16 ・ Delayed 190%2026-10-04 (Provisional)20 flights ・ Avg delay when late +21minOn time 18 ・ Delayed 293.8%2026-10-05 (Provisional)16 flights ・ Avg delay when late +21minOn time 15 ・ Delayed 1

Sep 6Sep 12Sep 18Sep 24Oct 5

Line = on-time departure rate (left axis); bars = flights operated (right axis), stacked as on-time and delayed. Hover (or tap) a point for the breakdown and the average delay of delayed flights. The green band marks 90% on-time departures and above. Dashed segments and pale bars are provisional, before the actuals are final.

Weekly · Last 12 weeks (from Monday)

On-time departureOn timeDelayed

50%70%90%0200 93.8%58.5%75.3%Week of 2026-07-2097 flights ・ Avg delay when late +53minOn time 73 ・ Delayed 2465.6%Week of 2026-07-27128 flights ・ Avg delay when late +87minOn time 84 ・ Delayed 4483.6%Week of 2026-08-03128 flights ・ Avg delay when late +49minOn time 107 ・ Delayed 2170.6%Week of 2026-08-10126 flights ・ Avg delay when late +43minOn time 89 ・ Delayed 3786.5%Week of 2026-08-17126 flights ・ Avg delay when late +39minOn time 109 ・ Delayed 1777%Week of 2026-08-24126 flights ・ Avg delay when late +69minOn time 97 ・ Delayed 2982.5%Week of 2026-08-31103 flights ・ Avg delay when late +32minOn time 85 ・ Delayed 1858.5%Week of 2026-09-07123 flights ・ Avg delay when late +110minOn time 72 ・ Delayed 5182.2%Week of 2026-09-14118 flights ・ Avg delay when late +124minOn time 97 ・ Delayed 2186.3%Week of 2026-09-21124 flights ・ Avg delay when late +36minOn time 107 ・ Delayed 1792.9%Week of 2026-09-28 (Provisional)126 flights ・ Avg delay when late +23minOn time 117 ・ Delayed 993.8%Week of 2026-10-05 (Provisional)16 flights ・ Avg delay when late +21minOn time 15 ・ Delayed 1

Jul 20Aug 10Aug 31Oct 5

Monthly · Last 12 months

On-time departureOn timeDelayed

60%70%80%90%100%01000 92.1%70.7%70.7%2026-07188 flights ・ Avg delay when late +68minOn time 133 ・ Delayed 5578.5%2026-08559 flights ・ Avg delay when late +57minOn time 439 ・ Delayed 12078.8%2026-09505 flights ・ Avg delay when late +88minOn time 398 ・ Delayed 10792.1%2026-10 (Provisional)89 flights ・ Avg delay when late +23minOn time 82 ・ Delayed 7

JulAugSepOct

“Provisional” values are preliminary. The last 2 days are still being corrected, so they may change slightly.

By route

Last 24 months

Most punctual

	Dep	n	Arr
Fukuoka→Incheon FUK-ICN	86.7%	n=143	88.8%
Yonago Kitaro→Incheon YGJ-ICN	86.5%	n=52	100.0%
Takamatsu→Incheon TAK-ICN	86.1%	n=72	87.5%
Incheon→Kansai ICN-KIX	83.6%	n=219	74.9%

Least punctual

	Dep	n	Arr
Narita→Incheon NRT-ICN	66.7%	n=216	77.8%
Incheon→Narita ICN-NRT	70.4%	n=216	66.5%
Incheon→Fukuoka ICN-FUK	80.4%	n=143	77.6%
Kansai→Incheon KIX-ICN	83.6%	n=219	84.9%

Routes flown

Routes not in the ranking above, ordered by flights in the last 28 days. The route pages show every airline's record.

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Domestic / International

	On-time departure		Avg delay when late	n
Domestic	—	Collecting data	—	n=1
International		82%	+99min	n=471

Avg delay when late counts only flights that departed more than 15 minutes behind schedule

By aircraft type

	On-time departure		Avg delay when late	n
Narrow-body
A320		82%	+99min	n=472

Avg delay when late counts only flights that departed more than 15 minutes behind schedule / Variants of the same type (B788, B789, B78X and so on) are grouped into one row.

By departure time

		Avg delay when late	n
6:00-9:00	86.1%	+53min	n=79
9:00-12:00	82.7%	+90min	n=133
12:00-15:00	81.6%	+128min	n=76
15:00-18:00	81%	+103min	n=121
18:00-21:00	75.4%	+111min	n=57
21:00-24:00	100%	—	n=6

Avg delay when late counts only flights that departed more than 15 minutes behind schedule / Faded rows are indicative (n<10); below n=5 no rate is shown

By day of week Last 24 months

Mon

Dep

75.9%n=174

Arr

78.2%n=174

Tue

Dep

82.5%n=160

Arr

80%n=160

Wed

Dep

80.3%n=178

Arr

80.9%n=178

Thu

Dep

77.5%n=178

Arr

76.4%n=178

Fri

Dep

75.4%n=211

Arr

78.6%n=210

Sat

Dep

80%n=185

Arr

80%n=185

Sun

Dep

80.5%n=195

Arr

81%n=195

See the full aircraft rotation history

Ship charts and fleet rotation show the last 3 days to everyone. Standard members (¥280/month) get the last 27 days for aircraft of Japanese airlines. The on-time data itself is free for all.

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Updated: 2026-10-06 / Last 28 days