[list of airports by iata code: a \- A] - AC
- ACA (MMAA) – General Juan N. Álvarez International Airport – Acapulco, Mexico
- ACB (KACB) – Antrim County Airport – Bellaire, Michigan, United States
- ACC (DGAA) – Kotoka International Airport – Accra, Ghana
- ACD (SKAD) – Acandi Airport – Acandi, Colombia
- ACE (GCRR) – Arrecife Airport – Lanzarote, Canary Islands, Spain
- ACH (LSZR) – St. Gallen Altenrhein Airport – Altenrhein, Switzerland
- ACI (EGJA) – Alderney Airport – The Blaye, Alderney, Channel Islands, United Kingdom
- ACJ (KACJ) – Souther Field – Americus, Georgia, United States
- ACK (KACK) – Nantucket Memorial Airport – Nantucket, Massachusetts, United States
- ACL (SKAG) – Cesar Airport – Aguaclara, Colombia
- ACM – Arica Airport – Arica, Colombia
- ACN (MMCC) – Ciudad Acuna International Airport – Ciudad Acuña, Mexico
- ACO (LSZD) – Ascona Airport – Ascona, Switzerland
- ACP (KACP) – Allen Parish Airport – Oakdale, Louisiana, United States
- ACQ (KACQ) – Waseca Municipal Airport – Waseca, Minnesota, United States
- ACR (SKAC) – Araracuara Airport – Araracuara, Colombia
- ACS – Achinsk Airport – Achinsk, Russia
- ACT (KACT) – Waco Regional Airport – Waco, Texas, United States
- ACU – Achutupo Airport – Achutupo, Panama
- ACV (KACV) – Arcata/Eureka Airport – McKinleyville, California (near Arcata and Eureka), United States
- ACY (KACY) – Atlantic City International Airport – Atlantic City, New Jersey, United States
- ACZ (KACZ) – Henderson Field – Wallace, North Carolina, United States
- ACZ – Zabol Airport – Zabol, Iran
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