How can ask a girl to hangout?

Allright so I just started going to this new school about a week ago, and there is this one girl i met on the bus and we always talk to each-other ...im really starting to like her, and i am sure i have a chance because she has shown her interest in me by siting next to me everyday. I really like this girl and I would like to hangout with her, how can I do this without appearing too straightforward or creepy.?