Lidia’s answer: If you currently reside in PA, the prerequisite for filing here is that one of the parties has resided in PA for 6 months. As far as the cheapest way, there may be a pro-se (by yourself) way to do it. However, attorneys here cannot advise you on “do it yourself” divorces. Moreover, divorce procedure in PA is not easy to navigate by yourself. If you lack financial means, you may try and obtain help of legal aid in your area