St. Louis, MO → Chicago, IL flight delays
STL → ORD · all airlines · 294 flights · April 2026 · source: US BTS
This route is delayed
28%of the time, by +131 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
72%
Delayed 3h+
4.7%
Cancelled
5.1%
Avg when late
+131m
Best & worst day to fly
Most on-time
Sunday
delayed 10%
Worst
Monday
delayed 44%
Which airline is most punctual on STL → ORD?
SkyWestdelayed 26%
Republicdelayed 26%
Americandelayed 29%
Envoydelayed 30%
Frequently asked
How often is the St. Louis, MO to Chicago, IL flight delayed?
About 28% of STL → ORD flights arrive late (15+ minutes), by an average of 131 minutes when they do, based on 294 flights in April 2026.
Which airline is most punctual on STL → ORD?
SkyWest, delayed 26% of the time — the best of the 4 airlines flying this route.
What is the best day to fly STL → ORD?
Sunday is the most on-time (delayed 10%), while Monday is the worst (delayed 44%).
Airport overviews