Definition
Under ICAO usage, an international airport is any airport designated by the contracting State in whose territory it is located as an airport of entry and departure for international air traffic, where the formalities incident to customs, immigration, public health, animal and plant quarantine, and similar procedures are carried out.
Plain English
An airport that a country has officially designated as a place where international flights can legally arrive and depart, and where passengers and cargo go through customs, passport checks, and other border procedures.
Context Anchor
You may see this term in international flight planning, airport information, and rules about where an aircraft may enter or depart a country.
Derivation
International comes from roots meaning “between nations.” That helps here because the term is not about the airport’s size or name; it is about handling flights that cross national borders.
Why Pilots Care
Only an airport with this designation can legally handle a flight crossing an international border. Landing at a non-designated field after an international leg creates serious legal and customs problems, so this status drives where international flights can begin and end.
Intuition Check
Do not assume an airport is an International Airport just because it is large or has “International” in its name. In this context, it means the country has officially designated it for international arrivals and departures with the required border procedures available.
Example Sentence 1
Because the destination was an ICAO international airport, the crew knew customs and immigration facilities would be available on arrival.
Example Sentence 2
Before departure the crew verified that the alternate airport also had International Airport status in case a diversion was needed.