Distance: if it's ollie-able, it's more than likely kickflip-able
Height: if it's ollie-able, it's not always probable to be kickflip-able, but still possible.
This is because more energy is required, as well as more needs to go right for it to work. Most people don't kickflip as high as their best ollie, even on their best day of skating.
I'd like to see a Tiago, Tyshawn, Jake Hayes challenge this theory at well known "vertical" style spots that haven't been kickflipped/heelflipped yet, rather than the typical UC Davis gap style spots with no height requirements