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

No clear winner: United’s KOA → DEN flights land within a few points of 92% on time whatever the hour.

Nonstops (seasonal or thin)


United	KOA	DEN	6h 49m	92%	1.4%	370	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Southwest Details →	KOA 20:25 → LAS 05:05WN 2171	1h 25m Las Vegas	LAS 06:30 → DEN 09:20 +1WN 2966	8h 55m	100%	100%
Southwest + Unitedtwo ticketsDetails →	KOA 15:35 → HNL 16:30WN 2169	3h 10m Honolulu	HNL 19:40 → DEN 06:17 +1UA 383	10h 42m	100%	90%
Alaska + Unitedtwo ticketsDetails →	KOA 21:19 → SEA 06:12AS 259	2h 44m Seattle	SEA 08:56 → DEN 12:45 +1UA 1505	11h 26m	99%	89%
United Details →	KOA 07:00 → SFO 15:10UA 1321	3h 46m San Francisco	SFO 18:56 → DEN 22:44UA 2436	11h 44m	100%	88%
United Details →	KOA 22:15 → LAX 06:32UA 1719	2h 15m Los Angeles	LAX 08:47 → DEN 12:13 +1UA 1912	9h 58m	98%	88%
Delta + Southwesttwo ticketsDetails →	KOA 20:50 → SEA 05:49DL 485	2h 01m Seattle	SEA 07:50 → DEN 11:25 +1WN 3397	10h 35m	97%	88%
American Details →	KOA 21:45 → PHX 06:35AA 664	1h 57m Phoenix	PHX 08:32 → DEN 11:29 +1AA 1757	9h 42m	99%	87%
United Details →	KOA 22:50 → SFO 07:00UA 1724	1h 31m San Francisco	SFO 08:31 → DEN 12:22 +1UA 2348	9h 32m	100%	83%

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.

Afternoon and evening

SFO · 57m · leaves 11:55 22%

SAN · 59m · leaves 10:37 23%

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