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Route Reliability

Seattle → Kailua-Kona

SEA–KOA · 2,688 miles · Seattle–Tacoma International Airport to Ellison Onizuka Kona International Airport

71
Usually Fine
WanderNerd Reliability Score
72%
Arrive within 15 minutes
7 min
Average arrival delay
1.3%
Cancelled
1,421
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Delta Air Lines79%365 flights
  2. 2.Alaska Airlines70%1,056 flights

What the data says

The 6–9 AM departure wins.

SEA–KOA flights departing between 6–9 AM arrived on time 84% of the time, versus 65% between 9 AM–12 PM.

Friday is doing you no favors.

SEA–KOA flights arrived on time 78% of the time on Wednesdays. On Fridays: 66%.

Delta Air Lines runs this route best.

Delta Air Lines arrived on time 79% of the time on this route; Alaska Airlines managed 70%.

Trending in the right direction.

SEA–KOA flights arrived on time 79% of the time over the last three months in the data, compared with 70% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon75%(199 flights)
  • Tue71%(198 flights)
  • Wed78%(194 flights)
  • Thu68%(199 flights)
  • Fri66%(196 flights)
  • Sat73%(200 flights)
  • Sun75%(203 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM84%(74 flights)
  • 9 AM–12 PM65%(285 flights)
  • 12–3 PM75%(568 flights)
  • 3–6 PM74%(234 flights)
  • 6–9 PM68%(227 flights)
On-time trend by month
86%
May

Jun 64% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202564%118
July 202560%121
August 202570%119
September 202579%111
October 202573%116
November 202577%108
December 202573%117
January 202671%124
February 202665%112
March 202658%121
April 202694%111
May 202686%111

Keep nerding

Based on 1,421 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.