Notes
Druid-only flight. NPC is a gossip flight master (Silva Fil'naveth / Bunthen Plainswind) in Nighthaven; the 1.12 path data lists only the outbound flight from Moonglade (to Rut'theran / Thunder Bluff). warcraft.wiki.gg (Rut'theran Village) says the Rut'theran roost also offered druid-only flights to Moonglade; the return leg is not in the 1.12 path export (possibly gossip-scripted). Coordinates are the Nighthaven spawn from Questie.
Confidence note
Classic-baseline (high: 1.12 taxi data + Classic NPC spawn DB)