In WoW Classic, travel is all done on foot. If you’re lucky enough to get a mount — at level 40, mind you — you can get around a little faster, but you can’t very well take a horse across the ocean. Whether you want to try out a new questing zone or your quests are taking you all over the place, here are all the ways you can travel between Kalimdor and Eastern Kingdoms as Horde or Alliance.
Along the coast of Theramore Island Another, both relatively quick and rather safe - way to get to Booty Bay from Stormwind or other Alliance territories is to take the roundabout route via Kalimdor. Start in Menethil Harbor (fly there, or walk the long way; pick up the flight path if you do not have it). Take the boat to Theramore Island. Theramore Isle (a.k.a. Theramore Keep or simply Theramore) was a human city and port town located in a rocky island east of Dustwallow Marsh, and was the capital of the kingdom of the same name. Before its destruction, it was considered the Alliance's most martial presence in Kalimdor. After Dalaran's destruction by the Scourge, Jaina Proudmoore took as many survivors of Lordaeron she could. Get a mage to port you there. From The Eastern Kingdoms (Stormwind or Ironforge), fly to Menethil Harbor. From there, it'll be the boat on the left dock.
Along the coast of Theramore Island. Another, both relatively quick and rather safe - way to get to Booty Bay from Stormwind or other Alliance territories is to take the roundabout route via Kalimdor. Start in Menethil Harbor (fly there, or walk the long way; pick up the flight path if you do not have it). Take the boat to Theramore Island.
The Alliance favors boats to get them from place to place, and as an Alliance player you have two faction-controlled options to go between the two continents. Simply find your requisite side of the dock to take the appropriate boat.
To get to these boat locations, flight points are available in Auberdine, Theramore, and Menethil Harbor. However, you’ll need to know all the flight points along your path in order to fly there.
Horde players get to soar through the skies on a flying zeppelin in Horde-controlled areas. Simply climb up the zeppelin tower and find the zeppelin masters to take the right flight.
To get to these zeppelin locations, flight points are available in Orgrimmar, Undercity, and Grom’gol. However, you’ll need to know all the flight points along your path in order to fly there.
There is one path between Kalimdor and Eastern Kingdoms that both factions can take. If you’re on a PVP server, take caution — both these areas are historically heavily contested.
Both factions can access the flight points in Ratchet and Booty Bay. Like the others, you’ll need to already have learned all the flight locations along your path in order to fly all the way there.
If time is of the essence and you want a quick trip, higher level Mages can port players to the various capitol cities. For Alliance, Mages get portals to Stormwind and Ironforge at level 40, and Darnassus at level 50. For Horde, Orgrimmar and Undercity are available at level 40, with Thunder Bluff at 50.
WoW Classic is all about the journey, but hopefully these ways to travel lessen a bit of that time for you. If you’re bored or feeling particularly frisky, you can also head over to the opposite faction’s boat or zeppelin locations. There is nothing actually preventing Alliance from riding zeppelins or Horde from riding the boats, as long as you can make it past the guards and any enemy players who take umbrage with your presence.