Yes, you can ask the guards, but sometimes I just like a map. Here are a couple of maps. One shows the portals in shat (in the center) and one shows the alliance flight path (off to the right).
For my money a good map with a marker is the best way to navigate. This isn't a tip blog, so don't look for a lot of that stuff, but I do love a good map.
Shat Alliance Flight Path: