Increase the number of inbetween frames in the path settings found in the Camera dialog box. Remember that a fluid animation runs at about 24 or 25 frames a second. Calculate how many seconds you want to take between each camera, and times by 24/25. You can add additional cameras to help slow the pacing further. Remember to set the playback framerate to 24/25 fps also. You may find you can get away with less fps, but you will have to experiment to find the minimum.
