We can use come out in the sense of coming from far away. But what's the difference between the following to sentences:
My parents are coming out for Christmas.
and
My parents are coming for Christmas.
Learn English – Come out vs just come
phrasal-verbssentence-meaning
Best Answer
If you think of where you live as being out, away from where your parents live (either because you perceive yourself as "away", or because you're seeing the locational aspect from their point of view) then out is fine. But it's also fine not to include the preposition (or to use up, down, over, by, etc.)
Ignore anyone who suggests there might be confusion because some people might think your parents are preparing to go public and admit they're homosexuals. That's just a perverse interpretation.