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Route · SEA → KOA · 2020–2025 BTS data

Seattle to Kona

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to KOA (Seattle to Kona) ranks #1744 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

79.6%
On-time
+0.6 pts
vs US avg
55 min
Delay when late
7,238
Flights
#1744 of 4927
Corpus placement

Cancelled

1.6%

Best Month

Jan 2025 90%

Worst Month

Jul 2025 58%

Distance

2,688 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 123 33 4 2 DL,AS
Nov 2025 117 26 2 7 AS,DL
Oct 2025 122 33 4 2 AS,DL
Sep 2025 111 23 0 0 DL,AS
Aug 2025 121 38 2 0 AS,DL
Jul 2025 123 52 1 1 AS,DL
Jun 2025 120 46 2 0 AS,DL
May 2025 124 27 0 0 AS,DL
Apr 2025 120 17 0 0 AS,DL
Mar 2025 124 20 0 1 AS,DL
Feb 2025 111 21 0 0 AS,DL
Jan 2025 124 12 2 2 AS,DL
Dec 2024 108 30 0 1 AS,DL
Nov 2024 97 11 0 0 AS,DL
Oct 2024 124 21 0 0 AS,DL
Sep 2024 120 30 0 0 AS,DL
Aug 2024 124 29 0 0 AS,DL
Jul 2024 124 27 1 0 AS,DL
Jun 2024 120 25 0 0 AS,DL
May 2024 111 16 0 0 AS,DL
Apr 2024 107 23 1 0 AS,DL
Mar 2024 120 12 0 0 AS,DL
Feb 2024 104 21 1 1 AS,DL
Jan 2024 109 27 25 16 AS,DL

SEA–KOA seasonal on-time pattern

Best: February (84.2%) · weakest: July (72.4%)

70%75%80%85% JanFebMarAprMayJunJulAugSepOctNovDec 74.9%

Strongest calendar month

February

84.2% on-time · ~98 flights/mo

Busiest calendar month

July

~123 flights/mo avg

Weakest calendar month

July

72.4% on-time · ~123 flights/mo

Cancellation Rate

1.6%

45 of 2,808 flights

Diversion Rate

1.2%

33 of 2,808 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA on-time profile

KOA - Kona

Full on-time, delay-cause, and seasonal performance for Kona, HI.

KOA on-time profile

Compare the two airports

See SEA and KOA side by side on delays, cancellations, and reliability.

Compare SEA vs KOA

Origin-hub reliability standing

Mid-pack among SEA departures

From SEA, this corridor sits with 63 other 75–85% on-time routes out of 89 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: Kona · fleet on-time rank #3321 of 4927.

What the Data Says About SEA to KOA

7,238 tracked flights put the SEA to KOA pairing (Seattle to Kona) at a 79.6% on-time rate, squarely in line with the wider network. Delays that do occur run 54.6 minutes on average. Across the 2,688-mile route and its 3 carriers, the trailing 24 months show 1.6% cancelled and 1.2% diverted (2,808 flights sampled).

The monthly split is wide on this route: Jan 2025 posted the strongest performance at 90% on-time, while Jul 2025 came in at just 58% - a 33-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–KOA peaks in February at 84.2% on-time while July carries the heaviest traffic (~123 flights per month) ; the softest month is July at 72.4%, a 11.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to KOA rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to KOA ranks #1744 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SEA to KOA? ▼
Flights from Seattle to Kona have a 79.6% on-time rate based on 7,238 flights. The average delay is 54.6 minutes. The best recent month was Jan 2025 with 90% on-time.
What is the cancellation rate for SEA to KOA? ▼
Over the last 24 months, 1.6% of flights on this route were cancelled (45 of 2,808 flights) and 1.2% were diverted.
How far is the flight from SEA to KOA? ▼
The flight distance from Seattle (SEA) to Kona (KOA) is approximately 2,688 miles. This route is served by 3 carriers.
When is the best time to fly from SEA to KOA? ▼
The best recent month for on-time performance was Jan 2025 (90% on-time). The worst was Jul 2025 (58% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
KOA Airport

Kona
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using SEA–KOA data

SEA–KOA is mid-pack at 79.6% on-time; month and carrier mix move more than the corridor headline.

  • Compare SEA and KOA airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, February (84.2% on-time) beats July (72.4%) on this corridor. Seasonal chart
  • 4 other routes post a similar 79.6% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.