Korean Air (KAL) on-time performance, September 2026
1,028 scheduled Korean Air departures in US airspace in September 2026, 88.2% of them on time. Measured from FAA departure data, updated every morning.
On time, day by day
Share of Korean Air departures within 15 minutes of schedule, by day. Light bars show each day's departures for context. Worst day: Wednesday 2 September at 75.9%. Best: Friday 18 September at 100.0%.
Airports, ranked by on-time share
Airports with at least 30 Korean Air departures in the month.
| Airport | Departures | On time | 45+ min late | Avg delay (min) |
|---|---|---|---|---|
| LAS Las Vegas | 30 | 100.0% | 0.0% | -10.8 |
| YYZ Toronto | 52 | 96.2% | 0.0% | -9.7 |
| DFW Dallas-Fort Worth | 60 | 95.0% | 1.7% | -6.0 |
| SEA Seattle | 47 | 91.5% | 0.0% | -8.4 |
| LAX Los Angeles | 127 | 91.3% | 0.8% | -4.2 |
| SFO San Francisco | 56 | 91.1% | 1.8% | -11.8 |
| GUM Agana | 56 | 91.1% | 0.0% | 2.4 |
| ANC Anchorage | 128 | 89.8% | 0.8% | -11.8 |
| HNL Honolulu | 51 | 88.2% | 3.9% | 4.7 |
| ATL Atlanta | 83 | 85.5% | 0.0% | 2.5 |
| YVR Vancouver | 64 | 84.4% | 0.0% | 1.2 |
| ORD Chicago | 88 | 84.1% | 8.0% | -4.8 |
| BOS Boston | 30 | 83.3% | 3.3% | 6.8 |
| JFK New York | 90 | 77.8% | 3.3% | -0.5 |
| IAD Washington | 30 | 76.7% | 6.7% | 11.7 |
Least punctual routes
Routes with at least 20 Korean Air departures, lowest on-time share first.
| Route | Flights | On time | Avg delay |
|---|---|---|---|
| JFK to ICN New York to Seoul | 81 | 76.5% | 0.9 |
| IAD to ICN Washington to Seoul | 30 | 76.7% | 11.7 |
| ANC to ICN Anchorage to Seoul | 26 | 80.8% | -8.7 |
| ATL to ICN Atlanta to Seoul | 62 | 82.3% | 8.3 |
| BOS to ICN Boston to Seoul | 30 | 83.3% | 6.8 |
| ORD to ICN Chicago to Seoul | 62 | 83.9% | -1.7 |
| YVR to ICN Vancouver to Seoul | 64 | 84.4% | 1.2 |
| HNL to ICN Honolulu to Seoul | 51 | 88.2% | 4.7 |
| LAX to ICN Los Angeles to Seoul | 88 | 89.8% | -0.6 |
| ANC to ORD Anchorage to Chicago | 54 | 90.7% | -8.2 |
Busiest routes
The ten routes Korean Air flew most this month.
| Route | Flights | On time | Avg delay |
|---|---|---|---|
| LAX to ICN Los Angeles to Seoul | 88 | 89.8% | -0.6 |
| JFK to ICN New York to Seoul | 81 | 76.5% | 0.9 |
| YVR to ICN Vancouver to Seoul | 64 | 84.4% | 1.2 |
| ATL to ICN Atlanta to Seoul | 62 | 82.3% | 8.3 |
| ORD to ICN Chicago to Seoul | 62 | 83.9% | -1.7 |
| SFO to ICN San Francisco to Seoul | 56 | 91.1% | -11.8 |
| GUM to ICN Agana to Seoul | 56 | 91.1% | 2.4 |
| ANC to ORD Anchorage to Chicago | 54 | 90.7% | -8.2 |
| HNL to ICN Honolulu to Seoul | 51 | 88.2% | 4.7 |
| YYZ to ICN Toronto to Seoul | 48 | 95.8% | -8.1 |
Other months for Korean Air
Airport pages for September 2026
How we measure
On time means the aircraft took off within 15 minutes of its scheduled departure, after subtracting the departure airport's normal taxi time (FAA SWIM reports wheels-off, not push-back, so the median taxi time of the last 30 days is taken off every flight first). Average delay is the mean of that taxi-adjusted delay over all departures; early departures count as negative minutes, so an operator that routinely leaves early can show a negative average. 45+ min late is the share of departures that left 45 minutes or more behind schedule, the point at which most connections are at risk.
Scope: scheduled airlines only, the same set as the monthly State of the Sky report (operators with published routes; private, fractional and charter operators are left out), so the two publications give the same numbers for the same month. Departures are counted by scheduled day (UTC). Each day's flights are rolled up overnight and published the next morning; the newest day keeps filling in for a day or two and is only shown once it is substantially complete. Figures can differ by a few tenths of a point from the State of the Sky report for the same month: that report is frozen on the 2nd of the following month, while these pages are rebuilt from the live rollup, which recomputes each airport's taxi baseline nightly and re-rolls the last week of the month as late departure times arrive (September 2026 at SFO: 16,398 departures in both, 69.2% on time here against 69.5% in the report).
Source: FAA System Wide Information Management (SWIM) flight plans and departure times, processed by PlaneTrack. Free to quote with credit to PlaneTrack (CC BY 4.0).