[list of airports by iata code: a \- A] - AU
- AUA (TNCA) – Reina Beatrix International Airport – Oranjestad, Aruba
- AUB – Itauba Airport – Itauba, Brazil
- AUC (SKUC) – Santiago Perez Airport – Arauca, Colombia
- AUD (YAGD) – Augustus Downs Airport – Augustus Downs, Queensland, Australia
- AUE – Abu Rudeis Airport – Abu Rudeis, Egypt
- AUF (LFLA) – Auxerre Branches Airport – Auxerre, France
- AUG (KAUG) – Augusta State Airport – Augusta, Maine, United States
- AUH (KAUH) – Aurora Municipal Airport (Al Potter Field) – Aurora, Nebraska, United States
- AUH (OMAA) – Abu Dhabi International Airport – Abu Dhabi, United Arab Emirates
- AUI – Aua Island Airport – Aua Island, Papua New Guinea
- AUJ – Ambunti Airport – Ambunti, Papua New Guinea
- AUK – Alakanuk Airport – Alakanuk, Alaska, United States
- AUL – Aur Island Airport – Aur Island, Marshall Islands
- AUM (KAUM) – Austin Municipal Airport – Austin, Minnesota, United States
- AUN (KAUN) – Auburn Municipal Airport – Auburn, California, United States
- AUO (KAUO) – Auburn-Opelika Robert G. Pitts Airport – Auburn, Alabama, United States
- AUP – Agaun Airport – Agaun, Papua New Guinea
- AUQ – Atuona Airport – Atuona, French Polynesia
- AUR (LFLW) – Aurillac Airport – Aurillac, France
- AUS (KAUS) – Austin-Bergstrom International Airport – Austin, Texas, United States
- AUT (WPAT) – Atauro Airport – Atauro, Indonesia
- AUU (YAUR) – Aurukun Airport – Aurukun Mission, Queensland, Australia
- AUV – Aurno Airport – Aurno, Papua New Guinea
- AUW (KAUW) – Wausau Downtown Airport – Wausau, Wisconsin, United States
- AUX – Araguaina Airport – Araguaina, Brazil
- AUY – Aneityum Airport – Aneityum, Vanuatu
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