I have a Uniden Bearcat 30 and live 9nm from my nearest airport.
With the attached aerial, there's no sign of the tower. A couple of quid on wire and I have a diy dipole aerial in the loft attached to the TV coax (wrong impedance) and that gives me a readable tower signal, but not ATIS. Height = 93ft ASL.
I made a dipole inside a Roach fishing pole and mounted that on the side of the shed, using RG58 coax, that gives almost as good signal, probably due to the lack of brickwork in the way. Height = 86ft ASL.
The airport is 77ft ASL with no hills inbetween.