Starting location was Darnassus. I sometimes go back to Darnassus to auction stuff, learn skills, etc. while questing in Darkshore. When I’m done I want to resume the guide, but the pathing tells you to take the ‘stormwind portal’ instead of just using the flight master to get back to darkshore.
And yes, once in Stormwind there isn’t any suggestion to take the Teldrassil portal. I play Horde mostly, so I didn’t even know that portal existed.