| Acronym | Definition |
|---|
| SAIA | South African Institute of Architects (est. 1996) |
| SAIA | Service Académique d'Inspection de l'Apprentissage (French: Academic Service Learning Inspectorate) |
| SAIA | San Antonio International Airport (Texas) |
| SAIA | South Australian Internet Association |
| SAIA | Servicio de Análisis e Información Antinarcóticos (Guatemala special police) |
| SAIA | Slovenská Akademická Informacná Agentúra (Slovak: Slovak Academic Information Agency) |
| SAIA | Sustainable Aquarium Industry Association (EU) |
| SAIA | Self-Awareness in Action |
| SAIA | Senior Air Interdiction Agent |
| SAIA | Strategic Alliance Investment Advisors, Inc. (Littleton, CO) |