When searching for Carnival Citi coupon codes for existing users, it is important to ensure the codes are valid and up-to-date. Look for promotions that offer discounts on Carnival cruises for loyal customers. Check reputable coupon websites for the latest deals and offers. Consider signing up for Carnival Citi’s newsletter to receive exclusive discounts and promotions. Remember to read the terms and conditions of each coupon code before applying it to your purchase. Enjoy savings on your next Carnival cruise with the right coupon code.