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

No clear winner: airlines and hours on this route all land within a few points of 4 in 5 on time.

Nonstops


Delta	JNU	SEA	2h 38m	93%	0.7%	141	Flying now
Alaska	JNU	SEA	2h 27m	80%	1.9%	1,449	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Seattle on time. Total trip = scheduled departure to arrival, layover included (Seattle is 1 h ahead of Juneau). Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	JNU 18:59 → ANC 20:48AS 1613	3h 41m Anchorage	ANC 00:29 → SEA 05:00 +1AS 221	9h 01m	97%	95%
Alaska Details →	JNU 07:36 → ANC 09:22AS 73	2h 53m Anchorage	ANC 12:15 → SEA 16:49AS 363	8h 13m	99%	90%
Alaska Details →	JNU 21:10 → ANC 22:56AS 67	3h 31m Anchorage	ANC 02:27 → SEA 06:58 +1AS 75	8h 48m	99%	83%
Alaska Details →	JNU 07:35 → KTN 08:35AS 60	3h 38m Ketchikan	KTN 12:13 → SEA 15:14AS 596	6h 39m	99%	79%
Alaska Details →	JNU 13:02 → ANC 14:48AS 65	1h 42m Anchorage	ANC 16:30 → SEA 21:05AS 268	7h 03m	92%	77%
Alaska Details →	JNU 09:55 → SIT 10:40AS 62	3h 28m Sitka	SIT 14:08 → SEA 17:29AS 652	6h 34m	98%	76%

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 73 JNU 07:36 → ANC Delta DL 2768 ANC 11:45 → SEA Connection details →	2h 23m	7h 50m	94%	87%
Alaska AS 67 JNU 21:10 → ANC Delta DL 925 ANC 01:30 → SEA Connection details →	2h 34m	7h 59m	93%	80%

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