Variable Hour Programs. Although 12 to 18 months is typical for an LPN program, there are options to complete the courses more quickly. You may choose to attend a program that finishes in less than a year.In this type of program, you will have longer hours during the day for coursework.here are many programs from which to choose. When making your decision, you will want to consider the length of each program. The average duration of an LPN program is 12 to 18 months. There are several considerations that can determine the length and type of the program you choose.