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"Far" is an adverb which is often translated as "lejos", and "away from" is a preposition which is often translated as "lejos de". Learn more about the difference between "far" and "away from" below.
far()
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
away from()
A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
a. lejos de
We're looking for a place away from the center of town.Buscamos un lugar para vivir lejos del centro de la ciudad.
b. alejado de
She spent a lot of time in the capital, away from her family.Estuvo mucho tiempo en la capital, alejada de su familia.