Know route fees in advance?

[LuckyLibra]

Hi -

Is there a way to know what the route fees will be before setting up a route? There seem to be a few routes where route fees are significantly more than other routes... the only thing I can that is different is the airport that is being flown to. Now the only thing I know to do is set up a route, and then later check the costs - either "other costs" on the route page, or "route fees" on the aircraft page.

Thanks...

[Sami]

Fees depend on the route distance, airport sizes and the size (mtow) of the plane you are using. They are billed when flown so it is not visible beforehand, currently.