Salt Lake City, UT → Seattle, WA flight delays
SLC → SEA · all airlines · 315 flights · April 2026 · source: US BTS
This route is delayed
11%of the time, by +44 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
89%
Delayed 3h+
0.6%
Cancelled
0.3%
Avg when late
+44m
Best & worst day to fly
Most on-time
Wednesday
delayed 4%
Worst
Thursday
delayed 19%
Which airline is most punctual on SLC → SEA?
SkyWestdelayed 0%
Deltadelayed 11%
Alaskadelayed 14%
Frequently asked
How often is the Salt Lake City, UT to Seattle, WA flight delayed?
About 11% of SLC → SEA flights arrive late (15+ minutes), by an average of 44 minutes when they do, based on 315 flights in April 2026.
Which airline is most punctual on SLC → SEA?
SkyWest, delayed 0% of the time — the best of the 3 airlines flying this route.
What is the best day to fly SLC → SEA?
Wednesday is the most on-time (delayed 4%), while Thursday is the worst (delayed 19%).
Airport overviews