How long does it take for a letter to get to Long Island New York?|136416

so i live in maryland and i sent a letter to long island new york, i sent it to a p.o box and i wanna now how long it will take to get there.
thanks!

Yes, about 3 days. I know it take 1 day to go anywhere on the Island _ another to Jersey, so I would say 3 Post Office business days.

3 days