Saw this on another forum and I thought some people here might find it useful:
Use the following link (below) to purchase general admission Kings Island tickets for $22 a piece. No taxes. If you choose e-mail delivery there are no processing fees either.
Even though this link will mention "Louisville Area", it doesn't matter where you live. We live 2 miles from the park and used our address when ordering tickets for friends visiting from out-of-town. Had no problem using the tickets.
This is a nice amusement park. Several good roller coasters and their new one Diamondback is a must ride. Very good kids area and they have two decent intermediate roller coasters for the kids that aren't quite tall enough for the big coasters.