Which departure time was most reliable for KOA to SEA?
Among qualifying KOA-to-SEA departure window results, Evening had the highest on-time rate: 88.0% of 200 flights. Late morning was lowest at 82.8% across 314 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 282 | 84.8% | 5.0% | 4.3% |
| Late morning | 314 | 82.8% | 8.9% | 1.3% |
| Afternoon | 102 | 83.3% | 7.8% | 0.0% |
| Evening | 200 | 88.0% | 4.0% | 3.5% |
| Night | 524 | 86.5% | 6.3% | 1.5% |
Which weekday was most reliable for KOA to SEA?
Among qualifying KOA-to-SEA weekday results, Tuesday had the highest on-time rate: 87.6% of 202 flights. Monday was lowest at 82.0% across 205 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 205 | 82.0% | 8.3% | 2.4% |
| Tuesday | 202 | 87.6% | 2.5% | 3.0% |
| Wednesday | 199 | 87.4% | 4.5% | 1.0% |
| Thursday | 203 | 87.2% | 7.4% | 1.0% |
| Friday | 203 | 85.7% | 5.9% | 3.4% |
| Saturday | 205 | 82.9% | 9.8% | 2.4% |
| Sunday | 205 | 84.4% | 6.3% | 2.0% |
Which airline was most reliable for KOA to SEA?
Among qualifying KOA-to-SEA airline results, Delta Air Lines had the highest on-time rate: 89.0% of 365 flights. Alaska Airlines was lowest at 84.0% across 1,057 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 1,057 | 84.0% | 6.9% | 2.0% |
| Delta Air Lines | 365 | 89.0% | 4.9% | 2.7% |
Which month was most reliable for KOA to SEA?
Among qualifying KOA-to-SEA month results, April 2026 had the highest on-time rate: 92.8% of 111 flights. December 2025 was lowest at 78.0% across 123 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 123 | 87.8% | 4.9% | 2.4% |
| August 2025 | 121 | 89.3% | 4.1% | 2.5% |
| September 2025 | 111 | 85.6% | 8.1% | 0.9% |
| October 2025 | 122 | 82.0% | 5.7% | 3.3% |
| November 2025 | 118 | 83.1% | 5.9% | 5.9% |
| December 2025 | 123 | 78.0% | 8.9% | 4.9% |
| January 2026 | 124 | 82.3% | 12.1% | 0.0% |
| February 2026 | 113 | 83.2% | 4.4% | 1.8% |
| March 2026 | 124 | 83.9% | 10.5% | 2.4% |
| April 2026 | 111 | 92.8% | 2.7% | 0.9% |
| May 2026 | 112 | 85.7% | 4.5% | 0.0% |
| June 2026 | 120 | 90.8% | 4.2% | 0.8% |
What drove KOA to SEA delay minutes?
Late aircraft was the largest recorded KOA-to-SEA delay category, accounting for 38.8% of 10,313 BTS-attributed delay minutes during July 2025–June 2026.
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