let (one) past
To allow one to pass by or around (someone or something). I need to get into the building to retrieve my briefcase—please let me past! I didn't want to drive any faster on the highway, so I moved closer to the curb to let the cars behind me past.
let someone (get) past
to allow someone to pass; to get out of the way so someone can pass. Please let me get past. I'm in a hurry. Do let me past.