Yes, you can generally move or modify your Walt Disney World reservation, but the flexibility and potential fees depend on your booking type and timing. For a Room-Only reservation, you can typically change your dates through the website or app up to 5 days before arrival without penalty, provided there is availability for your new dates. For Vacation Packages (hotel + tickets), changes made 30 days or more in advance are usually free, but changes made between 2 and 29 days before arrival often incur a $50 change fee plus any difference in price. If the new dates are more expensive, you will have to pay the difference; if they are cheaper, Disney will refund the balance. It is important to note that in 2026, you must also ensure your Theme Park Reservations are updated to match your new dates, as moving your hotel stay does not automatically guarantee that park entry will be available for the new period.