[list of airports by iata code: a \- A] - AI
- AIA (KAIA) – Alliance Municipal Airport – Alliance, Nebraska, United States
- AIC – Airok Airport – Airok, Marshall Islands
- AID (KAID) – Anderson Municipal Airport (Darlington Field) – Anderson, Indiana, United States
- AIE – Aiome Airport – Aiome, Papua New Guinea
- AIF (SBAS) – Assis Airport – Assis, São Paulo, Brazil
- AIG (KAIG) – Langlade County Airport – Antigo, Wisconsin, United States
- AIG (FEFY) – Yalinga Airport – Yalinga, Central African Republic
- AII (HDAS) – Ali-Sabieh Airport – Ali-Sabieh, Djibouti
- AIK (KAIK) – Aiken Municipal Airport – Aiken, South Carolina, United States
- AIL – Ailigandi Airport – Ailigandi, Panama
- AIM – Ailuk Island Airport – Ailuk Island, Marshall Islands
- AIN (PAWT) – Wainwright AS – Fort Wainwright, Alaska, United States
- AIO (KAIO) – Atlantic Municipal Airport – Atlantic, Iowa, United States
- AIP – Ailinglapalap Island Airport – Ailinglapalap Island, Marshall Islands
- AIR – Aripuana Airport – Aripuana, Brazil
- AIS (NGTR) – Arorae Island Airport – Arorae Island, Kiribati
- AIT (KAIT) – Aitkin Municipal Airport (Steve Kurtz Field) – Aitkin, Minnesota, United States
- AIT (NCAI) – Aitutaki Island Airport – Aitutaki, Cook Islands
- AIU (NCAT) – Atiu Island Airport – Atiu Island, Cook Islands
- AIV (KAIV) – George Downer Airport – Aliceville, Alabama, United States
- AIW – Ai-Ais Airport – Ai-Ais, Namibia
- AIY (KAIY) – Atlantic City Municipal Airport (Bader Field) – Atlantic City, New Jersey, United States (closed September 30, 2006)
- AIZ (KAIZ) – Lee C. Fine Memorial Airport – Lake Ozark, Missouri, United States
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