SEA to KOA flight delays & on-time performance
Nonstop flights from Seattle–Tacoma International Airport to Ellison Onizuka Kona International Airport at Keāhole · 2,688 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SEA or KOA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Seattle (SEA) to Kona (KOA) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.2% were cancelled, and 6% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (78% on time); Alaska Airlines was the least (73%).
- Departures scheduled around 2pm did best (81% on time); around 5pm did worst (65%).
- Wednesday was the most reliable day to fly (80% on time) and Friday the least (67%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (41%).
Which airline is most on time from SEA to KOA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 78% | 1.9% | 12 min | 5.0% | 365 |
| Alaska Airlines | 73% | 0.9% | 15 min | 6.8% | 1,056 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am79%33 flights
- 8am88%42 flights
- 9am61%42 flights
- 10am69%167 flights
- 11am68%80 flights
- 12pm67%150 flights
- 1pm80%79 flights
- 2pm81%289 flights
- 3pm76%191 flights
- 4pm96%25 flights
- 5pm65%88 flights
- 6pm73%199 flights
- 7pm77%35 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday78%1.0% cancelled
- Tuesday75%0.0% cancelled
- Wednesday80%1.0% cancelled
- Thursday71%1.0% cancelled
- Friday67%1.9% cancelled
- Saturday71%0.5% cancelled
- Sunday78%2.9% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)41%
- Air traffic control & airport congestion31%
- Late-arriving aircraft26%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)59%
- Extreme weather41%
- Air traffic control & airport congestion0%
- Security0%
SEA to KOA: common questions
- How often are SEA to KOA flights on time?
- 74% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Seattle to Kona cancelled?
- 1.2% of scheduled flights were cancelled (17 of 1,421).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 50 min behind schedule on average, and 6.3% of flights were an hour or more late.
- How long is taxi time at SEA?
- Flights on this route spent 22 min taxiing from the gate to takeoff on average.
Related routes
Return trip: KOA to SEA — 87% on time
More flights from Seattle
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SEA → KOA, nonstop flights by US airlines that report to the DOT. How we calculate this.