Planet Fitness Coupons & Promo Codes for Mar 2021. Today's best Planet Fitness Coupon Code: 25% off entire purchase planet fitness store. Coupons.com Mobile App. Save $100s with free paperless grocery coupons at your favorite stores! Link your store loyalty cards, add coupons, then shop and save. Get App; Promo Codes Promo Codes. Shop online with coupon codes from top retailers. Get Sears coupons, Best Buy coupons, and enjoy great savings with a Nordstrom promo code.