When I take a flight path from Stormwind to anywhere else, I get teleported back to Stormwind.
It happened several times last night, so I finally walked to Westfall. There were no mobs, NPCs, or other players anywhere. I had to leave the area and /reload before anything would show up.
I tried relogging and restarting the game. I haven’t logged in since last night and the first flight path I take today (Westfall) teleports me right back to the flight master in Stormwind.