Yes, I know it exists but heavily regulated which makes the offer of this service very expensive and rare.

> it would be a lot of fun to have some uber of small planes and helicopters.

You mean [charter flights](https://en.wikipedia.org/wiki/Air_charter)?

flying

Inside a Single-Engine Aircraft | How a Cessna 172 Works

This is so cool and very sad we don't have commercial flights of those small airplanes everywhere, it would be a lot of fun to have some uber of small planes and helicopters. But the govt and big airplane companies would not make it easy.