For comfort and flattering fit, shop the maternity pants sale at Old Navy. Save when you buy maternity pants on sale from this relaxed and stylish collection. Find pants in our maternity pants sale collection that are designed to give you support where you really need it. We offer maternity pants on sale with built-in elastic that supports your baby bump. Made with a special fabric blend, the pants offered in our maternity pants sale are the perfect choice for your entire pregnancy and beyond.