What is a suffix for distant?

There isn't a common suffix specifically for "distant" in the English language. However, depending on the context, you could use various suffixes to create related words:

For distance:

* -ance: distance

* -ant: distant (adjective)

For remoteness:

* -ness: remoteness

For separation:

* -ation: separation

For extension:

* -ion: extension (referring to a distant point)

For being far away:

* -ly: distantly (adverb)

The best suffix to use will depend on the specific meaning you want to convey.