Six Flags adds membership option at former Cedar Fair parks (opens in new tab)

By Robert Niles: Six Flags is expanding its membership program to five former Cedar Fair theme parks.Starting Monday, memberships are expanding to Carowinds, Dorney Park, Kings Dominion, Kings Island, and Knott's Berry Farm. The change also applies to those locations' associated water parks.Memberships at Six Flags theme parks are a rolling 12-month payment plan for park access and perks. They different from season passes that are valid for one calendar year and require upfront payments.With ...