St. Louis, MO → Denver, CO flight delays
STL → DEN · all airlines · 286 flights · April 2026 · source: US BTS
This route is delayed
20%of the time, by +47 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
80%
Delayed 3h+
0%
Cancelled
0.7%
Avg when late
+47m
Best & worst day to fly
Most on-time
Saturday
delayed 4%
Worst
Friday
delayed 35%
Which airline is most punctual on STL → DEN?
Uniteddelayed 14%
Southwestdelayed 24%
Frequently asked
How often is the St. Louis, MO to Denver, CO flight delayed?
About 20% of STL → DEN flights arrive late (15+ minutes), by an average of 47 minutes when they do, based on 286 flights in April 2026.
Which airline is most punctual on STL → DEN?
United, delayed 14% of the time — the best of the 2 airlines flying this route.
What is the best day to fly STL → DEN?
Saturday is the most on-time (delayed 4%), while Friday is the worst (delayed 35%).
Airport overviews