On platforms like Airbnb or VRBO in 2026, the difference between "Instant Book" and "Request to Book" centers on the level of host control and the speed of the transaction. Instant Book allows you to confirm your stay immediately without needing a manual approval from the host. As long as you meet the host’s pre-set requirements (such as a verified ID or a certain number of positive reviews), your credit card is charged and the reservation is locked in instantly. This is the preferred method for travelers who need a quick confirmation. Request to Book, conversely, requires you to send a message to the host with your intended dates and details about your trip. The host then has 24 hours to review your profile and message before deciding to "Accept" or "Decline" the reservation. This is often used by hosts who want to ensure their guests are a good fit for their home or who have complex scheduling needs. For the traveler, "Instant Book" provides more certainty, while "Request to Book" allows for a more personal introduction but carries the risk that the host might reject the request, forcing you to start your search over.