Salt Lake City, UT → Seattle, WA flight delays
SLC → SEA · all airlines · 338 flights · May 2026 · source: US BTS
This route is delayed
17%of the time, by +45 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
83%
Delayed 3h+
0%
Cancelled
0.3%
Avg when late
+45m
Best & worst day to fly
Most on-time
Saturday
delayed 6%
Worst
Friday
delayed 27%
Which airline is most punctual on SLC → SEA?
Alaskadelayed 16%
Deltadelayed 17%
SkyWestdelayed 20%
Frequently asked
How often is the Salt Lake City, UT to Seattle, WA flight delayed?
About 17% of SLC → SEA flights arrive late (15+ minutes), by an average of 45 minutes when they do, based on 338 flights in May 2026.
Which airline is most punctual on SLC → SEA?
Alaska, delayed 16% of the time — the best of the 3 airlines flying this route.
What is the best day to fly SLC → SEA?
Saturday is the most on-time (delayed 6%), while Friday is the worst (delayed 27%).
Airport overviews