Cheap flights from Chicago to Saint Louis
From 166 USD — compare hundreds of airlines
Direct flightsCheapest: 2026-07 · 103 US$
Prices by date
103 US$
04/07
140 US$
05/07
140 US$
06/07
140 US$
07/07
140 US$
08/07
140 US$
09/07
140 US$
10/07
177 US$
11/07
Airlines on this route
FAQ
What's the cheapest month to fly Chicago to Saint Louis?
Usually 2026-07, from 103 USD.
Are there direct flights from Chicago to Saint Louis?
We show both direct and connecting options — filter to compare.