Get up to 40% off this selection of prom dresses plus an additional 25% off when you enter the coupon code SAVE60 at checkout at JCPenney.com. Choose from 82 styles. This ties with the best discount we've seen offered on prom dresses so far this season. Some best bets are the pictured Terani Couture Glamour Evening Gown, which drops from $450 to $299.99 to $224.99 after the code, a savings of 50%, and this City Triangle Prom Sleeveless Evening Gown, which drops from $250 to $149.99 to $112.49 after the code, a savings of 55%. Shipping adds $8.95 or is free on orders over $99. Sales tax is charged in most states.