BIA
- Baghdad International Airport
- Bahrain International Airport
- Bandaranaike International Airport
- Bangkok International Airport (disambiguation)
- Bangor International Airport
- Bankruptcy and Insolvency Act
- Basic indicator approach
- Bastia – Poretta Airport
- Beatriz Haddad Maia
- Beatriz Vaz e Silva
- Beijing Institute of Aerodynamics
- Beirut International Airport
- Belfast International Airport
- Bengaluru International Airport
- Bia (Brazilian footballer)
- Bia (Ghana parliament constituency)
- Bia (TV series)
- Bia (butterfly)
- Bia (mythology)
- Bia (plant)
- Bia (rapper)
- Bia District
- Bia National Park
- Bia River
- Bia de' Medici
- Bia, Togo
- Biar (disambiguation)
- Bilateral Immunity Agreement
- Bioelectrical impedance analysis
- Birmingham Airport
- Birmingham–Shuttlesworth International Airport
- Bius
- Blackpool International Airport
- Board of Immigration Appeals
- Bohemia Interactive Australia
- Border and Immigration Agency
- Braille Institute of America
- Brazilian Intelligence Agency
- Bridgeport International Academy
- Bristol Airport
- British Institute in Amman
- British Island Airways
- Brunei Investment Agency
- Brussels International Airport
- Bureau of Indian Affairs
- Burma Independence Army
- Burned-in address
- Bus Industries of America
- Business impact analysis
- Business improvement area
- Business–IT alignment
- Bïa
- Bīā
- Long-finned goby
- Maria Francisca Bia
- Metroxylon salomonense
- Phou Bia
- Security and Intelligence Agency (Serbia)