Where is the closest Six Flags?

Question

I want to take my visiting family to Six Flags and the website is not working. We live in Nebraska, on the border of Iowa. Where would be the closest park?

Answer 1

Don't forget Adventureland in Des Moines or Worlds of Fun down in Kansas City for an alternate. Never been to a Six Flags so I don't know if they're any bigger or better.

Answer 2

If you're near Omaha, the Six Flags in St. Louis, Missouri is going to be the closest according to Google Maps (6 hours 38 minutes).  It would be another hour more to the Six Flags in Gurnee, Illinois.