Do I need a ship, a zeppelin or the tram?

No. The way is over land, or by flight path.

Can Alliance players make this trip?

Yes, in about 15 min on foot. Horde territory: guards and players will attack you. Horde capital. You will not be welcome.

Are these times exact?

They are estimates, give or take a quarter: flight times come from real Classic flights, walking times from the real size of each zone, and ships and zeppelins count up to five minutes of waiting.

How to get from Orgrimmar to Thunder Bluff in WoW Forever

About 3 min by flight path once you have it, or about 15 min on foot. Times are for a Horde character.

Open this route on the map

On foot

15 min

Travel form

11 min

druids, shamans

Mount 60%

10 min

from level 40

Mount 100%

8 min

level 60

Flight path

3 min

fastest

The way, step by step

Before you have the flight paths. Times on foot.

Start in Orgrimmar
Capital city in Durotar
Cross into The Barrens
Through the Southfury bridge at Far Watch Post · level 10–25
≈ 4 min
Cross into Mulgore
Through the pass west of Camp Taurajo · level 1–10
≈ 8 min
Arrive at Thunder Bluff
Capital city in Mulgore
≈ 3 min

With the flight paths

With a 100% mount and the flight paths you have discovered.

Start in Orgrimmar
Capital city in Durotar
Fly from Orgrimmar to Thunder Bluff
Flight path · time measured in Classic
≈ 3 min
Arrive at Thunder Bluff
Capital city in Mulgore

And the way back?

From Thunder Bluff to Orgrimmar: about 3 min by flight path, or 15 min on foot.

Open the way back on the map

Questions

Do I need a ship, a zeppelin or the tram?: No. The way is over land, or by flight path.
Can Alliance players make this trip?: Yes, in about 15 min on foot. Horde territory: guards and players will attack you. Horde capital. You will not be welcome.
Are these times exact?: They are estimates, give or take a quarter: flight times come from real Classic flights, walking times from the real size of each zone, and ships and zeppelins count up to five minutes of waiting.