I don't know what it is exactly, I only stuck an aircraft on the route for a bit of competition to try it out.
The problem is, I don't have any other aircraft that can be used on the route. I was wondering, will blocking seats on the flights fix this problem?
Yes.
How low must I block it?
Monopoly is triggered when you have >200% of demand. So if demand is 50 pax and you have a 125 seat aircraft, you need to get it below 100 seats.
Also important is that you don´t offer more than 200% on any single flight in any direction, so your base for calculation is the slowest day (usually sa), not the general route demand number.Since
demand numbers are not static and change week to week , you also have to build in a security buffer in case demand numbers decline. After all, you should really consider not servicing that route
at all if it´s not just a fill-up-route for an otherwise parking aircraft, and there is no adequate route available.