The time of iCal importation from external calendars to Stays is standardized, based on the shortest possible interval, in order to avoid risks in relation to your calendars.

Check below for additional information:

Channel
Summary
AirbnbRegarding Airbnb, due to the technical properties of their platform, the standard import time will be of 30 minutes.
Do not forget that Stays is an official Airbnb partner and you can connect your listings through API connection, which is the most recommended model!
Other channels and Stays calendarsThe importation time will be 15 minutes.