For a limited time on select Carnival Cruise sailings you'll enjoy great rates and you may also receive up to $50 FREE onboard credit. Not all fares displaying online are eligible for this offer. Onboard spending is based on double occupancy and offer is not valid for guarantee categories. Promotion is based on availability, may be withdrawn at any time; additional restrictions may apply. Please call for more details. Offer ends 11:59 pm EST on 10/216!