All flights from Chicago Executive Airport are via private charter. Please refer to the website www.chiexec.com. Look under Airport Businesses, Aircraft Charters for the list of companies you can call.
We do not have commercial airline operations (United, American, etc. with individual ticket purchase) here at PWK. There are a number of charters listed on our web site that will fly you to St. Louis though. They usually charter the entire airplane for an hourly charge, but some have open individual seats. This is rarely on a set schedule.
Thanks! Your answer is awaiting moderation.