Delta Air Lines is the most reliable airline on the KOA to SEA route with a 91% on-time rate, compared to Alaska Airlines at 84%. Based on 1,285 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: KOA to SEA
Kona to Seattle — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines91%
Alaska Airlines84%
KOA to SEA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 91% | 1.6% | 73m | 1,285 |
| Alaska AirlinesASWorst | 84% | 1.7% | 60m | 3,788 |
Route Overview
86%
Overall On-Time
62m
Avg Delay
1.6%
Cancel Rate
5,073
Total Flights
Flying out of KOA? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.