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 KTN → JNU flights land within a few points of 86% on time whatever the hour.

Nonstops (seasonal or thin)


Alaska	KTN	JNU	58m	86%	3.0%	362	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Juneau on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	KTN 09:20 → SEA 12:21AS 60	1h 22m Seattle	SEA 13:43 → JNU 15:17AS 435	5h 57m	91%	70%
Alaska Details →	KTN 17:23 → SEA 20:21AS 64	1h 02m Seattle	SEA 21:23 → JNU 22:55AS 71	5h 32m	87%	59%
Alaska + Deltatwo ticketsDetails →	KTN 12:13 → SEA 15:14AS 596	1h 31m Seattle	SEA 16:45 → JNU 18:19DL 2169	6h 06m	65%	54%
Tight connection: often missed
Alaska Details →	KTN 17:39 → SIT 18:32AS 67	58m Sitka	SIT 19:30 → JNU 20:12AS 67	2h 33m	73%	53%
Alaska Details →	KTN 16:00 → SEA 19:00AS 214	50m Seattle	SEA 19:50 → JNU 21:22AS 1559	5h 22m	62%	45%

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

SIT · 58m · leaves 17:39 27%

SEA · 50m · leaves 16:00 38%

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