Yes, changes to an existing reservation with Costco Travel are generally possible, but the specifics will depend on the type of reservation and the associated policies. In most cases, customers may be able to modify elements such as dates, accommodations, and travel packages, but fees may apply depending on the terms of the booking. It is important for customers to review the terms and conditions associated with their original reservation, as these will provide valuable information on what changes are allowed and any potential costs involved. To make a change, travelers typically need to visit the Costco Travel website and navigate to their account, where they can access their bookings. There, they will find options for modification as well as guidance on how to proceed. For detailed instructions or specific questions related to an individual reservation, checking the current web page will provide the most accurate information.