Kailua-Kona (KOA) to Seattle (SEA) flights
Alaska Airlines, Delta Air Lines fly nonstop from Ellison Onizuka Kona International Airport at Keāhole to Seattle-Tacoma International Airport, with about 27 flights a week in July 2026. The 2,688-mile flight takes about 5h 44m gate to gate.
- Distance
- 2,688 mi · 4,326 km
- Flight time
- 5h 44m
- Airlines
- 2
- Seats filled
- 83%
Airlines flying KOA to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 21 | Boeing 737 MAX 9, Boeing 737-800, Boeing 737-900ER | 150,463 | 5h 45m |
| Delta Air Lines | 7 | Airbus A321, Boeing 757-200, Boeing 757-300 | 56,130 | 5h 43m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
KOA to SEA flight schedule
5 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 8:03am and the last at 9:19pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 513Alaska Airlines | 8:03am | 4:55pm | 18 | 93% |
| AS 475Alaska Airlines | 12:52pm | 9:47pm | 13 | 85% |
| AS 205Alaska Airlines | 1:18pm | 10:11pm | 18 | 81% |
| DL 485Delta Air Lines | 8:42pm | 5:35am | 31 | 91% |
| AS 259Alaska Airlines | 9:19pm | 6:12am | 31 | 91% |
Is KOA to SEA on time?
From September 2025 to August 2026, 87% of 1,412 flights arrived within 15 minutes of schedule and 2.3% were cancelled. Flights leaving around 8pm were the most punctual (91%), those around 11am the least (81%). Most delay time was caused by late-arriving aircraft (38%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 1,047 | 86% | 9 min | 1.9% |
| Delta Air Lines | 365 | 90% | 6 min | 3.3% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 8am to 9am | 259 | 90% | |
| 9am to 10am | 51 | 92% | |
| 10am to 11am | 39 | 84% | |
| 11am to 12pm | 162 | 81% | |
| 12pm to 1pm | 41 | 73% | |
| 1pm to 2pm | 122 | 85% | |
| 8pm to 9pm | 235 | 91% | |
| 9pm to 10pm | 379 | 89% | |
| 10pm to 11pm | 87 | 91% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 118 | 18,335 | |
| September 2025 | 110 | 12,929 | |
| October 2025 | 118 | 15,507 | |
| November 2025 | 112 | 15,418 | |
| December 2025 | 118 | 17,019 | |
| January 2026 | 124 | 19,204 | |
| February 2026 | 111 | 17,467 | |
| March 2026 | 121 | 19,242 | |
| April 2026 | 111 | 18,058 | |
| May 2026 | 112 | 17,122 | |
| June 2026 | 119 | 18,194 | |
| July 2026 | 121 | 18,098 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.