Using the same airline, or subsidiaries of the same airline (eg BA and Loganair, or Delta and DeltaConnection), find a route between two airports with the most number of flights, but which is the most direct route between those airports. For example, LON-NYC on BA is valid but LON-MAN-NYC on BA is not because there is a more direct option on the same airline Count each stopover as a seperate flight. Codeshares don't count.
Best I can find is:
I thought there was a QF feeder flight from MAN which would make this 6 flights, but can't find it.