When you're at a base it will tell you the directions and distances to other nearby bases. You can pick which you want to go to, remember what direction it is in, and then fly in that direction until it comes up on the minimap. It will show as a red/green area on the ground, and you have to land in the middle square.

Took me a while too. Go north for a while and you'll come across red lights. Aim for those!