When will my onboard credit be applied to my account? October 29, 2018 12:38 Updated Your onboard spending will be applied to your cruise account within 24 hours of boarding your cruise. Related articles What is my "up to $750 Onboard Credit" amount? How do I access my Cheap Cruises reservation details (invoice)? How do I choose between Onboard Credit or Amazon gift card? What if I wait too long to complete the redemption steps for either the Amazon gift card or the Onboard Credit? What is Onboard Credit (OBC)?