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"En" is a form of "en", a preposition which is often translated as "in". "Por avión" is a phrase which is often translated as "by airmail". Learn more about the difference between "en" and "por avión" below.
en(
ehn
)A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
por avión(
pohr
ah
-
byohn
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (transport)
a. by airmail
¿Es más caro enviar un paquete por avión que por barco?Is it more expensive to send a parcel by airmail than by ship?
b. by plane
Todas las cerezas que exportamos a otros países las mandamos por avión.We send all the cherries we export to other countries by plane.
c. airmail
Si quieres que la carta llegue antes del martes, tienes que escribir "por avión" en el sobre.If you want the letter to arrive before Tuesday, you have to write "airmail" on the envelope.