SEA to JNU Flight Delays Today & Most Reliable Flights

77% of SEA → JNU flights arrived on time in June-August 2026 (583 flights). The most reliable was AS 61, on time 93% of the time on this route. Afternoon flights did best (81%), evening flights worst (68%). Seattle (SEA): no delay reported. JNU (JNU): no delay reported.

Best time of day to fly SEA → JNU

Morning (before noon)	79%
Afternoon (noon-5 PM)	81%
Evening (after 5 PM)	68%

Flights SEA → JNU, most reliable first

Flight	Departs	On time on this route	Late avg	Cancelled
AS 61 Alaska Airlines	7:08 AM	93%	57m	1.6%
DL 2169 Delta	4:45 PM	82%	40m	2.2%
AS 435 Alaska Airlines	1:43 PM	80%	59m	0%
AS 208 Alaska Airlines	9:56 AM	72%	45m	0%
AS 209 Alaska Airlines	11:24 AM	72%	57m	1.2%
AS 71 Alaska Airlines	9:23 PM	71%	47m	1.4%
AS 1559 Alaska Airlines	7:50 PM	66%	36m	0%

SEA conditions · JNU → SEA · Cancellations

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From BTS on-time data, June-August 2026; flights with 20+ trips on this route. On-time rates cover each flight number's whole day, which can include other legs. Departure times are local.