Where to catch Altaria

In Paldea (Scarlet & Violet)

• Casseroya Lake — Walk
• North Province (Area One) — Walk
• North Province (Area Two) — Walk
• South Province (Area Six) — Walk
• West Province (Area One) — Walk
• West Province (Area Three) — Walk, Static Encounter

In Blueberry Academy (Scarlet & Violet – The Indigo Disk)

• Canyon Biome — Walk

In Hoenn (Ruby, Sapphire & Emerald)

• Sky Pillar — Walk

Altaria — full Pokédex entry