What else have you already seen?
You could try things like Interstellar, Bladerunner, Dune (which I love), Ready Player One, Alita Battle Angel, Galaxy Quest (more comedic), Gravity, Annihilation, THE MARTIAN and others.
If you know more specifically what you're looking for, let us know and I can tailor some suggestions. E.g. Lost in space stye films, or fantasy ones with aliens and unknown worlds, or dystopian futures etc.