Informal:
* Hasta luego: This is the most common and versatile option, suitable for friends and family.
* Nos vemos: This is another common phrase that literally means "we'll see each other".
* Más tarde: This literally means "later", but it's understood as "see you later" in casual contexts.
Formal:
* Hasta pronto: This is a more formal way to say "see you later", suitable for acquaintances or professionals.
* Hasta la próxima: This means "until next time" and is a good option when you're unsure when you'll see the person again.
Other options:
* Nos vemos después: This means "we'll see each other later" and is a slightly more formal alternative to "Nos vemos".
* Te veo después: This means "I'll see you later" and is a more personal alternative to "Nos vemos".
The best choice depends on the specific situation.