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

Connect in the morning. The same 70-minute layover misses 14% of the time at 11 am and 36% of the time at 4 pm.

Nonstops


Delta	SEA	KOA	6h 05m	78%	1.9%	365	Flying now
Alaska	SEA	KOA	6h 16m	74%	0.9%	1,056	Flying now

Best connections, one ticket

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 Seattle). Layovers up to 4 hours. Pick a connection for the details.


United Details →	SEA 13:30 → SFO 15:48UA 737	3h 20m San Francisco	SFO 19:08 → KOA 21:45UA 731	11h 15m	97%	87%
United Details →	SEA 05:15 → SFO 07:35UA 5676 · flown by SkyWest	2h 35m San Francisco	SFO 10:10 → KOA 12:37UA 694	10h 22m	99%	86%
United Details →	SEA 05:00 → DEN 08:43UA 2601	3h 32m Denver	DEN 12:15 → KOA 15:37UA 1758	13h 37m	99%	84%
American Details →	SEA 06:16 → PHX 09:18AA 3792 · flown by Envoy	1h 22m Phoenix	PHX 10:40 → KOA 14:06AA 663	10h 50m	97%	82%
Southwest Details →	SEA 05:00 → SMF 06:50WN 3629	3h 10m Sacramento	SMF 10:00 → KOA 12:20WN 3783	10h 20m	100%	80%
Alaska Details →	SEA 10:55 → HNL 14:04AS 626	3h 26m Honolulu	HNL 17:30 → KOA 18:16AS 1158	10h 21m	99%	79%
Delta Details →	SEA 10:05 → LAX 12:54DL 2769	3h 50m Los Angeles	LAX 16:44 → KOA 19:17DL 311	12h 12m	100%	79%
Alaska Details →	SEA 13:30 → HNL 16:34AS 899	2h 11m Honolulu	HNL 18:45 → KOA 19:31AS 1168	9h 01m	90%	76%
Tight connection: often missed
Alaska Details →	SEA 10:55 → HNL 14:04AS 626	1h 10m Honolulu	HNL 15:14 → KOA 16:01AS 1138	8h 06m	72%	54%
United Details →	SEA 13:30 → SFO 15:48UA 737	1h 07m San Francisco	SFO 16:55 → KOA 19:31UA 1723	9h 01m	64%	52%
Alaska Details →	SEA 13:30 → HNL 16:34AS 899	56m Honolulu	HNL 17:30 → KOA 18:16AS 1158	7h 46m	46%	36%

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

HNL · 1h 17m · leaves 08:00 14%

Afternoon and evening

LAX · 1h 18m · leaves 12:35 6%

SFO · 1h 07m · leaves 13:30 36%

HNL · 56m · leaves 13:30 54%

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.


Alaska AS 626 SEA 10:55 → HNL Southwest WN 1911 HNL 17:15 → KOA Connection details →	3h 11m	10h 10m	97%	87%
Alaska AS 680 SEA 13:20 → SFO United UA 731 SFO 19:08 → KOA Connection details →	3h 37m	11h 25m	98%	87%
Frontier F9 1178 SEA 11:03 → LAX United UA 1718 LAX 17:10 → KOA Connection details →	3h 09m	11h 44m	98%	85%

Rank all connections, any airlines →

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