The obvious character journey (well for me it is!) is that of Frodo Baggins in The Lord of the Rings. Everything about this story is epic! However, character journeys can be much smaller than that. Scrooge went on a journey of sorts as he transformed from a miserable miser to a generous (and much happier) man in A Christmas Carol.
So what journeys are your characters going on? If it is a physical journey, why are they making it? Do they like travelling or is is something where they have no choice? What obstacles must they overcome? What is the landscape like? Are they from a background where travelling is normal? (It generally wasn't for hobbits so Frodo's journey was unusual from that angle).
If the journey is more of a character development one, is the journey a good one or a bad? (People can go from being good to bad, so why not characters?). Is it a successful journey? What is the impact of the character change on them and those around them? Change can threaten others so how is this dealt with?