vs 

QUICK ANSWER
"Hasta luego" is a form of "hasta luego", a phrase which is often translated as "see you later". "Buenas noches" is a form of "buenas noches", a phrase which is often translated as "good evening". Learn more about the difference between "hasta luego" and "buenas noches" below.
hasta luego(
ahs
-
tah
 
lweh
-
goh
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. see you later
Gracias. Ya tengo que irme. - Está bien. ¡Hasta luego!Thanks. I have to go now. - Okay. See you later!
b. so long
He estado aquí demasiado tiempo. Debería irme. ¡Hasta luego!I've been here for too long. I should go. So long!
c. good-bye
Tengo que irme. ¡Hasta luego!I have to go. Good-bye!
d. bye
Tenemos que irnos. ¡Hasta luego!We've got to go. Bye!
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buenas noches(
bweh
-
nahs
 
noh
-
chehs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. good evening
Buenas noches y bienvenidos.Good evening and welcome.
a. good night
Me voy a dormir. ¡Buenas noches!I'm going to sleep. Good night!
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