Seattle (SEA) to Kailua-Kona (KOA) flights
Alaska Airlines, Delta Air Lines fly nonstop from Seattle-Tacoma International Airport to Ellison Onizuka Kona International Airport at Keāhole, with about 27 flights a week in July 2026. The 2,688-mile flight takes about 6h 12m gate to gate.
- Distance
- 2,688 mi · 4,326 km
- Flight time
- 6h 12m
- Airlines
- 2
- Seats filled
- 81%
Airlines flying SEA to KOA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 21 | Boeing 737 MAX 9, Boeing 737-800, Boeing 737-900ER | 142,219 | 6h 13m |
| Delta Air Lines | 7 | Airbus A321, Boeing 757-200, Boeing 757-300 | 59,745 | 6h 8m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to KOA flight schedule
5 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 10:03am and the last at 6:59pm. 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 518Alaska Airlines | 10:03am | 1:24pm | 13 | 77% |
| AS 204Alaska Airlines | 11:27am | 2:35pm | 18 | 75% |
| DL 340Delta Air Lines | 2:30pm | 5:35pm | 31 | 76% |
| AS 238Alaska Airlines | 3:59pm | 7:05pm | 31 | 77% |
| AS 200Alaska Airlines | 6:59pm | 10:10pm | 17 | 75% |
Is SEA to KOA on time?
From September 2025 to August 2026, 75% of 1,410 flights arrived within 15 minutes of schedule and 1.4% were cancelled. Flights leaving around 1pm were the most punctual (80%), those around 5pm the least (66%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (39%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 1,045 | 74% | 14 min | 1.1% |
| Delta Air Lines | 365 | 76% | 12 min | 2.2% |
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 |
|---|---|---|---|
| 7am to 8am | 33 | 79% | |
| 8am to 9am | 30 | 86% | |
| 9am to 10am | 42 | 61% | |
| 10am to 11am | 161 | 71% | |
| 11am to 12pm | 98 | 66% | |
| 12pm to 1pm | 119 | 71% | |
| 1pm to 2pm | 79 | 80% | |
| 2pm to 3pm | 289 | 79% | |
| 3pm to 4pm | 209 | 75% | |
| 4pm to 5pm | 38 | 92% | |
| 5pm to 6pm | 88 | 66% | |
| 6pm to 7pm | 188 | 75% | |
| 7pm to 8pm | 35 | 77% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 119 | 16,577 | |
| September 2025 | 111 | 13,413 | |
| October 2025 | 117 | 17,461 | |
| November 2025 | 108 | 16,293 | |
| December 2025 | 118 | 18,779 | |
| January 2026 | 124 | 17,967 | |
| February 2026 | 112 | 17,024 | |
| March 2026 | 121 | 18,196 | |
| April 2026 | 111 | 15,816 | |
| May 2026 | 111 | 15,854 | |
| June 2026 | 120 | 17,540 | |
| July 2026 | 121 | 17,044 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.