Chicago, IL → St. Louis, MO flight delays
ORD → STL · all airlines · 291 flights · April 2026 · source: US BTS
This route is delayed
31%of the time, by +67 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
69%
Delayed 3h+
1.8%
Cancelled
4.8%
Avg when late
+67m
Best & worst day to fly
Most on-time
Sunday
delayed 15%
Worst
Monday
delayed 40%
Which airline is most punctual on ORD → STL?
Republicdelayed 23%
Envoydelayed 24%
Uniteddelayed 29%
Americandelayed 36%
SkyWestdelayed 39%
Frequently asked
How often is the Chicago, IL to St. Louis, MO flight delayed?
About 31% of ORD → STL flights arrive late (15+ minutes), by an average of 67 minutes when they do, based on 291 flights in April 2026.
Which airline is most punctual on ORD → STL?
Republic, delayed 23% of the time — the best of the 5 airlines flying this route.
What is the best day to fly ORD → STL?
Sunday is the most on-time (delayed 15%), while Monday is the worst (delayed 40%).
Airport overviews