How long does it typically take to complete an online paralegal training course?

It depends on what school you are looking at attending. At one school it could take 14 weeks. Another school might offer a 12 month course. National Paralegal College offers a paralegal certificate in as little as 7 months, a paralegal associate's degree in 15 months and a bachelor's degree in legal studies in less than three years. So, it all depends on what type of program you're looking at and what school you plan to attend.