From the Ring of Transference, travelers can use portals and flight master's services to reach the other Shadowlands zones, while portals back to Orgrimmar and Stormwind City in the land of the living are available at the city's entrance.
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How do I get to Orgrimmar in Shadowlands?
You can take the portal behind the throne room, and it will put you safely outside the city if you're not phased to the past. Then just mosey over to the portal on the zeppelin tower. There's a portal on the room to the right next to where Lor'themar is.