Originally Posted by
littlevoices
There doesn't seem to be an equivilent of the Maximimum permitted mileage at BMI - just a 'how sensible is the routing and is it a permittable one according to the standard *A timetable. If your routing appears on staralliance.com when searching for the start/end airports you won't have a problem. Otherwise the standard advice is to state your route sector by sector and you should be fine.
However BMI does frown on backtracking, but I think in this case - considering the stopover, you'll probably be fine.
That has not been my experience. The ICC starts off with official routings thrown by the computer and what is on there is fine. If you want a different routing, they then look at, among other things, the mileage. To give you an example, I was specifically told that an FLL-BOS-FRA-LHR routing was not allowed due to exceeding the MPM (by a handful of miles) whereas FLL-BOS-FRA was OK. They eventually let me have it after discussion (as a 'one-time exception' of course) as the MPM excess was minimal but nonetheless were quite clear that they do base themselves on that for creative routings (as well as backtracking issues etc...).