You're also familiar with sigil circles? I wonder if we were from similar worlds in our past lives. Is the name Candlekeep familiar to you?

To your point about the circles, though—to my knowledge, true teleportation as we would understand it isn't possible in Thedas. I've read some about gates that require traversing a Crossroads, what you may know as a kind of demiplane, but they aren't common here by any means, and recreating that magic would be taxing to say the least—not necessarily something we have the resources to work on at present, unfortunately.