In the 90s there was a small airfield near my home in the US that Continental had some basic puddle jumper service at. There was a small office that could reasonably hold about 50 or so people that was between the parking lot and the tarmac. There was practically no security. One could go from buying the ticket in cash to boarding the plane in five minutes. Checked luggage was handed to the attendant at the bottom of the stairs.

It was nice as it connected to a major international airport on the far side of town. Instead of an hour long drive each way it was a 15-minute drive, barely leaving the neighborhoods. Free parking at a generally safe part of town. Really easy to get in and out, no hassle.

It operated until 9/11 happened. From what I understand pretty much all commercial operations there really died out, as it was also an air national guard and coast guard base.