PlainFlights

Route · KOA → SJC · 2020–2025 BTS data

Kona to San Jose

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), KOA to SJC (Kona to San Jose) ranks #3748 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

82.9%
On-time
+3.9 pts
vs US avg
67 min
Delay when late
2,126
Flights
#3748 of 4927
Corpus placement

Cancelled

0.6%

Best Month

Sep 2023 97%

Worst Month

Dec 2022 63%

Distance

2,384 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2024 31 8 0 0 AS
Oct 2024 30 4 0 0 AS
Aug 2024 31 2 0 0 AS
Jul 2024 31 8 0 0 AS
Dec 2023 42 6 0 2 WN,AS
Nov 2023 40 2 0 0 AS,WN
Oct 2023 62 9 0 0 AS,WN
Sep 2023 60 2 0 0 AS,WN
Aug 2023 62 12 0 0 AS,WN
Jul 2023 62 12 0 0 AS,WN
Jun 2023 60 17 1 0 AS,WN
May 2023 62 6 0 0 AS,WN
Apr 2023 60 14 0 0 WN,AS
Mar 2023 56 11 0 0 WN,AS
Feb 2023 44 8 0 0 AS,WN
Jan 2023 52 9 1 0 AS,WN
Dec 2022 56 21 3 0 AS,WN
Nov 2022 52 11 0 0 WN,AS
Oct 2022 49 6 0 0 WN,AS
Sep 2022 50 7 0 1 WN,AS
Aug 2022 62 12 1 1 AS,WN
Jul 2022 62 11 0 0 WN,AS
Jun 2022 58 18 1 1 WN,AS
May 2022 48 7 0 0 WN,AS

KOA–SJC seasonal on-time pattern

Best: September (92.4%) · weakest: June (75.3%)

70%75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 76.6%

Strongest calendar month

September

92.4% on-time · ~52 flights/mo

Busiest calendar month

June

~59 flights/mo avg

Weakest calendar month

June

75.3% on-time · ~59 flights/mo

Cancellation Rate

0.6%

7 of 1,222 flights

Diversion Rate

0.4%

5 of 1,222 flights

Explore origin & destination

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

KOA - Kona

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

KOA on-time profile

SJC - San Jose

Full on-time, delay-cause, and seasonal performance for San Jose, CA.

SJC on-time profile

Compare the two airports

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

Compare KOA vs SJC

Origin-hub reliability standing

Mid-pack among KOA departures

From KOA, this corridor sits with 4 other 75–85% on-time routes out of 13 tracked departures, not the hub's reliability leaders (9 at ≥85%) and not the softest ( 0 below 75%). Destination: San Jose · fleet on-time rank #1991 of 4927.

What the Data Says About KOA to SJC

Bureau of Transportation Statistics records show Kona to San Jose (KOA to SJC) running a 82.9% on-time rate over 2,126 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 66.7 minutes. The 2,384-mile corridor is served by 3 carriers, and over the last 24 months 0.6% of 1,222 flights were cancelled, 0.4% diverted.

The monthly split is wide on this route: Sep 2023 posted the strongest performance at 97% on-time, while Dec 2022 came in at just 63% - a 34-point swing worth factoring into travel timing.

On the multi-year calendar, KOA–SJC peaks in September at 92.4% on-time while June carries the heaviest traffic (~59 flights per month) ; the softest month is June at 75.3%, a 17.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does KOA to SJC rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, KOA to SJC ranks #3748 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 KOA to SJC? ▼
Flights from Kona to San Jose have a 82.9% on-time rate based on 2,126 flights. The average delay is 66.7 minutes. The best recent month was Sep 2023 with 97% on-time.
What is the cancellation rate for KOA to SJC? ▼
Over the last 24 months, 0.6% of flights on this route were cancelled (7 of 1,222 flights) and 0.4% were diverted.
How far is the flight from KOA to SJC? ▼
The flight distance from Kona (KOA) to San Jose (SJC) is approximately 2,384 miles. This route is served by 3 carriers.
When is the best time to fly from KOA to SJC? ▼
The best recent month for on-time performance was Sep 2023 (97% on-time). The worst was Dec 2022 (63% on-time). Consider booking during months with historically better performance.

Airports on this route

KOA Airport

Kona
SJC Airport

San Jose
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 KOA–SJC data

KOA–SJC runs 3.9 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare KOA and SJC airport profiles: delay causes and top routes differ even on the same corridor. KOA airport
  • If your dates flex, September (92.4% on-time) beats June (75.3%) on this corridor. Seasonal chart
  • 4 other routes post a similar 82.9% 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.