You would have to look for a specific airline thread. Or alliance (star Alliance, OneWorld etc) thread, or destination thread.
I'm not aware of any threads that break that down but info is easily obtained by doing a Google search or by checking the airline website.
Most are destination based (ie AA charges 25k for a saver award in the continental US regardless of destination). Few are distance based (ie BA as you mentioned) and a few are revenue based like Southwest and JetBlue.