Latias locations — where to catch

In Paldea (Scarlet & Violet)

• South Province (Area Four) — Static Encounter

In Johto & Kanto (HeartGold & SoulSilver)

• Pewter City — Static Encounter
• Roaming Johto — Roaming
• Roaming Kanto — Static Encounter

In Hoenn (Ruby, Sapphire & Emerald)

• Southern Island — Static Encounter

Other games (6)

• Ultra Sun / Ultra Moon (Gen 7): Ultra Space Wilds, Ultra Space
• Omega Ruby / Alpha Sapphire (Gen 6): Southern Island
• Black 2 / White 2 (Gen 5): Dreamyard
• HeartGold / SoulSilver (Gen 4): Kanto
• Emerald (Gen 3): Hoenn
• Ruby / Sapphire (Gen 3): Hoenn

Latias — full Pokédex entry