Excel users can similarly use an available, blank range of cells in their workbook. If you are using Word, just substitute the blank slide area with a blank area on your document. However, for larger flowcharts, you can use PowerPoint's hyperlinking options that let you spread the same flowchart over multiple slides.
Alternatively, here are some thoughts that will help you decide which of these three programs work best for your flowcharts:
If you already need to create a flowchart in Word, Excel, or PowerPoint, then the choice has already been made for you.