Historical on-time performance
Seattle to Kona
2,688 miData through May 2026Source: US DOT · BTS
Flights on SEA–KOA arrive on time 70% of the time over the last 12 months.
On-time rate70%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 1,393 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time79%Medianon timep9030 minCancel1.8%Flights337
- Alaska AirlinesOn-time67%Medianon timep9050 minCancel1.1%Flights1,056
Why flights run late
Delay causes
- Airline42%
- Weather2%
- Air traffic (NAS)29%
- Late aircraft27%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline56%
- Weather44%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 18 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 SEA → KOA
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 73% to 82% on time.
- Mornings82% on time · p90 25 min · 806 flights
- Afternoons79% on time · p90 35 min · 884 flights
- Evenings73% on time · p90 35 min · 982 flights
- Middays73% on time · p90 40 min · 1,575 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 79% on time.
- Wednesdays79% on time · p90 30 min · 592 flights
- Sundays78% on time · p90 35 min · 610 flights
- Tuesdays76% on time · p90 35 min · 598 flights
- Mondays76% on time · p90 35 min · 602 flights
- Saturdays75% on time · p90 40 min · 620 flights
- Thursdays74% on time · p90 30 min · 612 flights
- Fridays74% on time · p90 40 min · 613 flights
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