Bunthen Plainswind is a level 65 wind rider flight master located in Nighthaven in the contested territory of Moonglade. He only provides transport to Thunder Bluff for Horde Druids.
It is a straight one-way flight which ends at flight master Tal. The player is not able to fly back from any flight master including Tal himself.
Plainswind is the opposite of the night elf flight master Silva Fil'naveth, who gives a ride to to Darnassus for Alliance Druids.
See List of Moonglade NPCs.