Historical on-time performance
Kona to Seattle
2,688 miData through May 2026Source: US DOT · BTS
Flights on KOA–SEA arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled2.3%of scheduled flights
based on 1,394 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time88%Medianon timep9010 minCancel3.0%Flights337
- Alaska AirlinesOn-time83%Medianon timep9020 minCancel2.1%Flights1,057
Why flights run late
Delay causes
- Airline35%
- Weather2%
- Air traffic (NAS)25%
- Late aircraft37%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline66%
- Weather34%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 32 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly KOA → SEA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 71% to 87% on time.
- Overnights87% on time · p90 15 min · 2,183 flights
- Mornings86% on time · p90 15 min · 511 flights
- Middays81% on time · p90 25 min · 1,095 flights
- Afternoons71% on time · p90 50 min · 391 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 88% on time.
- Wednesdays88% on time · p90 15 min · 595 flights
- Tuesdays86% on time · p90 15 min · 596 flights
- Sundays84% on time · p90 20 min · 609 flights
- Mondays83% on time · p90 25 min · 601 flights
- Thursdays83% on time · p90 20 min · 613 flights
- Fridays82% on time · p90 25 min · 614 flights
- Saturdays81% on time · p90 25 min · 620 flights
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