Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: Alaska’s PDX → KOA flights land within a few points of 86% on time whatever the hour.

Nonstops (seasonal or thin)


Alaska	PDX	KOA	5h 58m	86%	0.0%	365	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Kailua/Kona on time. Total trip = scheduled departure to arrival, layover included (Kailua/Kona is 3 h behind Portland). Layovers up to 4 hours. Pick a connection for the details.


Alaska + Unitedtwo ticketsDetails →	PDX 10:45 → LAX 13:20AS 695	3h 50m Los Angeles	LAX 17:10 → KOA 19:47UA 1718	12h 02m	99%	87%
Alaska + Southwesttwo ticketsDetails →	PDX 07:00 → OGG 09:58AS 739	3h 52m Kahului	OGG 13:50 → KOA 14:30WN 3099	10h 30m	100%	86%
United Details →	PDX 05:15 → SFO 07:01UA 1896	3h 09m San Francisco	SFO 10:10 → KOA 12:37UA 694	10h 22m	99%	86%
Alaska + Southwesttwo ticketsDetails →	PDX 10:30 → HNL 13:28AS 813	3h 47m Honolulu	HNL 17:15 → KOA 18:05WN 1911	10h 35m	98%	85%
Southwest Details →	PDX 05:00 → LAS 07:10WN 344	2h 20m Las Vegas	LAS 09:30 → KOA 12:45WN 4452	10h 45m	96%	85%
United Details →	PDX 05:00 → DEN 08:31UA 459	3h 44m Denver	DEN 12:15 → KOA 15:37UA 1758	13h 37m	99%	84%
United Details →	PDX 11:16 → SFO 13:07UA 1613	3h 48m San Francisco	SFO 16:55 → KOA 19:31UA 1723	11h 15m	100%	83%
Alaska + Unitedtwo ticketsDetails →	PDX 14:49 → SFO 16:40AS 236	2h 28m San Francisco	SFO 19:08 → KOA 21:45UA 731	9h 56m	91%	82%
Tight connection: often missed
Alaska Details →	PDX 09:19 → SEA 10:21AS 427	1h 06m Seattle	SEA 11:27 → KOA 14:35AS 204	8h 16m	61%	45%
United Details →	PDX 07:00 → SFO 08:56UA 2818	1h 14m San Francisco	SFO 10:10 → KOA 12:37UA 694	8h 37m	40%	35%
Alaska Details →	PDX 07:46 → HNL 10:36AS 879	52m Honolulu	HNL 11:28 → KOA 12:16AS 1078	7h 30m	43%	33%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

SFO · 1h 09m · leaves 05:15 5%

HNL · 1h 15m · leaves 07:46 15%

SEA · 1h 06m · leaves 09:19 39%

Afternoon and evening

LAX · 53m · leaves 13:25 11%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON