Chris on 12/15/2009 10:30:27 PM:
Not sure how that ride would be as I have never done it. I'm sure a local could chime in for help.
What I do know is that the MetroLink light rail system allows bikes on-board, departs from the Lambert Airport & will take you downtown to a stop near the Amtrak station. This would save most of your ride as you would only need to cycle from St. Charles to the airport which isn't too far really.