Hasta pronto

Literally, Spanish for "Until soon." The meaning is closer to "See you soon!" and is similar to "Hasta luego," "See ya," "Until the next time" (implying that the next time won't be far off).

Qué pases buenas noches! Hasta pronto!
Translation: Have a good night! See you soon!

Hemos platicado dos horas -- debo irme. Hasta pronto...
Translation: We've been talking for two hours -- I should go. See you soon...