Sioux Falls Flirt is an online dating website. They deal with all types of singles. Membership is only allowed if you are 18 years and older. A basic membership is absolutely free but if you would like to chat to other members, you need to upgrade your membership. The cost of membership is $27.99 for one month or 3 months membership for only $39.99. Sioux Falls Flirt does not run any background checks on their members and they will not take any responsibility for information leaked out or users harassing you.