BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
SEA→KOA

Seattle, WA (SEA) to Kona, HI (KOA) flight delay odds

71.3% of 1,421 official scheduled SEA-to-KOA flights arrived on time; 15.7% arrived at least 30 minutes late and 1.1% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
71.3%arrived on time
15.7%30+ min late
1.1%cancelled
1,421scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.8%all scheduled flights
120+ minutes late1.8%all scheduled flights
Diverted1.0%did not reach as scheduled
Average arrival+5.2 mincompleted flights

Which departure time was most reliable for SEA to KOA?

Among qualifying SEA-to-KOA departure window results, Early morning had the highest on-time rate: 82.9% of 76 flights. Late morning was lowest at 65.4% across 289 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning7682.9%9.2%0.0%
Late morning28965.4%21.1%0.3%
Afternoon73474.7%13.6%1.0%
Evening32266.1%17.1%2.5%

Which weekday was most reliable for SEA to KOA?

Among qualifying SEA-to-KOA weekday results, Wednesday had the highest on-time rate: 76.8% of 198 flights. Friday was lowest at 62.6% across 203 flights.

DayFlightsOn time30+ minCancelled
Monday20575.1%12.2%1.0%
Tuesday20372.9%12.3%0.5%
Wednesday19876.8%11.6%1.0%
Thursday20269.8%16.3%1.0%
Friday20362.6%21.7%2.0%
Saturday20569.3%20.5%0.5%
Sunday20572.7%15.1%2.0%

Which airline was most reliable for SEA to KOA?

Among qualifying SEA-to-KOA airline results, Delta Air Lines had the highest on-time rate: 77.0% of 365 flights. Alaska Airlines was lowest at 69.3% across 1,056 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines1,05669.3%17.1%0.9%
Delta Air Lines36577.0%11.5%1.6%

Which month was most reliable for SEA to KOA?

Among qualifying SEA-to-KOA month results, April 2026 had the highest on-time rate: 93.7% of 111 flights. March 2026 was lowest at 55.6% across 124 flights.

MonthFlightsOn time30+ minCancelled
July 202512356.1%28.5%0.8%
August 202512166.9%17.4%1.7%
September 202511179.3%10.8%0.0%
October 202512268.0%15.6%3.3%
November 202511770.1%11.1%1.7%
December 202512368.3%17.9%3.3%
January 202612470.2%17.7%0.0%
February 202611364.6%18.6%0.0%
March 202612455.6%25.8%2.4%
April 202611193.7%2.7%0.0%
May 202611284.8%6.2%0.0%
June 202612081.7%13.3%0.0%

What drove SEA to KOA delay minutes?

Airline was the largest recorded SEA-to-KOA delay category, accounting for 40.1% of 19,377 BTS-attributed delay minutes during July 2025–June 2026.

Airline40.1%
Late aircraft28.6%
National airspace29.6%
Weather1.7%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.