Hippogryph mounts became available with Patch 2.3.0. Six epic quality mounts are currently available in-game. Of these, one is exclusively attainable by Alliance players.
Flameward Hippogryph is obtained from [The Molten Front Offensive].
Leyfeather Hippogryph is obtained from [Glory of the Legion Hero].
The Long-Forgotten Hippogryph is granted upon interacting with 5 Ephemeral Crystals around Azsuna within 8 hours, and not dying or logging out in the process.
The Cloudwing Hippogryph is a possible drop from [Farondis Chest].
Cenarion War Hippogryph is sold by Fedryen Swiftspear <Cenarion Expedition Quartermaster> at the Cenarion Refuge in Zangarmarsh. It requires Exalted reputation with the Cenarion Expedition.
The Argent Hippogryph can be purchased from tournament faction quartermasters for 150 [Champion's Seal] in Icecrown.
Silver Covenant Hippogryph is sold by Hiren Loresong <Silver Covenant Quartermaster> in the Silver Covenant Pavilion for 150 [Champion's Seal]. It requires the completion of the [A Silver Confidant] achievement.
[Smoldering Reins of the Teldrassil Hippogryph] was a reward from  From the Ashes... during the War of the Thorns world event.
Trading Card Game
These mounts are obtained by redeeming loot codes with Landro Longshot in Booty Bay.
- The Blazing Hippogryph can be obtained from the Wrathgate TCG expansion set.
- The Corrupted Hippogryph can be obtained from the Crown of the Heavens TCG expansion set.
The Emerald Hippogryph is one of the reward mounts available for those who bring a friend into WoW through the Recruit-A-Friend system.