There is more than one place called Oia:

Brazil

• OIA ^IATA — Ourilândia do Norte Airport in Pará (Brazil)

Greece

• Oia or Ia — a town on Santorini island

Portugal

• Oiã a town in Oliveira do Bairro municipality

Spain

• Oia (Spain) — a municipality in Galicia

United States of America

• "OIA" — is a local abbreviation for Orlando International Airport (MCO ^IATA)

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