Aeropostale frequently offers 50-70% off sitewide sales. Plus, you can often find coupons for an extra 15% off $75 or 20% off $100. Some of the best discount codes are valid on clearance. Sometimes, you can find coupons for an extra 30-50% off clearance items that are already discounted! The best time to shop at Aeropostale would be during their Black Friday sale.