Chicago, IL → St. Louis, MO flight delays
ORD → STL · all airlines · 324 flights · May 2026 · source: US BTS
This route is delayed
22%of the time, by +68 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
78%
Delayed 3h+
1.6%
Cancelled
1.2%
Avg when late
+68m
Best & worst day to fly
Most on-time
Wednesday
delayed 15%
Worst
Monday
delayed 31%
Which airline is most punctual on ORD → STL?
Envoydelayed 12%
SkyWestdelayed 22%
Americandelayed 26%
Uniteddelayed 28%
Frequently asked
How often is the Chicago, IL to St. Louis, MO flight delayed?
About 22% of ORD → STL flights arrive late (15+ minutes), by an average of 68 minutes when they do, based on 324 flights in May 2026.
Which airline is most punctual on ORD → STL?
Envoy, delayed 12% of the time — the best of the 4 airlines flying this route.
What is the best day to fly ORD → STL?
Wednesday is the most on-time (delayed 15%), while Monday is the worst (delayed 31%).
Airport overviews