Is there a shuttle bus from airport to the Orleans?

YES AND THAT APPLIES TO ALL HOTEL CASINOS LOCATED DOWNTOWN & ON THE STRIP

Sometimes it's cheaper to use Uber out Lyft, then paying $7.50 a piece for the shuttle

Yes

Orleans is not on the strip or downtiwn

Yes but it is not directly to and from the airport

Showtime Tours is the one I use from the airport to the Orleans.

I didn't see a bus but they do have taxy cabs parked by the entrance available for guests. I hope this was helpful...