The rule of thumb is about 1 hour per 100 images. This time does not count uploading time.
This relation is not exactly linear, since the model complexity and overlap between images can vary. Nevertheless, for standard area scanning flights, this rule of thumb is applicable. To see how to make a drone flight How to make a drone photogrammetry flight.
Also, when an upload to Skysset is finished, you will receive an email specifying the estimated time it will take to convert your images into a 3D model capture.
If your processing times are taking longer than expected, please contact support@skysset.com