BA gives you bronze status for 25 qualifying sectors in a year - that could be as little as 125 TP or 4,325 miles (LHR-LBA commuting).

Still, if you're in an airport for more than one O&D return per month on average, it's not a bad definition, because you're interacting with all the apparatus of the airport and airline even if you're not in the seat itself for that long.