Hasta que nos encontremos otra vez
This is the most common and direct translation.
Here are some other variations:
* Hasta la próxima vez que nos veamos (Until the next time we see each other)
* Hasta que nos volvamos a ver (Until we see each other again)
* Hasta pronto (See you soon) - This is more casual and can be used for a goodbye.
The best translation for you will depend on the context of your conversation.