Denver, CO → Seattle, WA flight delays
DEN → SEA · all airlines · 469 flights · April 2026 · source: US BTS
This route is delayed
16%of the time, by +50 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
84%
Delayed 3h+
0.4%
Cancelled
0.2%
Avg when late
+50m
Best & worst day to fly
Most on-time
Saturday
delayed 4%
Worst
Thursday
delayed 23%
Which airline is most punctual on DEN → SEA?
Deltadelayed 8%
Frontierdelayed 9%
Uniteddelayed 12%
Alaskadelayed 15%
Southwestdelayed 25%
SkyWestdelayed 26%
Frequently asked
How often is the Denver, CO to Seattle, WA flight delayed?
About 16% of DEN → SEA flights arrive late (15+ minutes), by an average of 50 minutes when they do, based on 469 flights in April 2026.
Which airline is most punctual on DEN → SEA?
Delta, delayed 8% of the time — the best of the 6 airlines flying this route.
What is the best day to fly DEN → SEA?
Saturday is the most on-time (delayed 4%), while Thursday is the worst (delayed 23%).
Airport overviews