How about a how long how short? The only qualification must be that you climbed out of the aircraft on the ground and it had actually got airborne and landed using wing borne flight before landing on its wheels.
That lets out the Rotarys and the Spruce Goose. Harriers don't count either as they just use hot air and neither do gliders!
The Vulcans at Waddington used to aim at less than 2.5 minutes when en route to Coningsby so that they could log zero flight time.