When planning a flight route that crosses multiple countries, understanding overflight permit procedures is crucial for compliance and safety. Here’s an overview of the overflight permit requirements for several countries in Asia and the Caucasus.

Afghanistan requires a thorough application process, where pilots must submit flight plans detailing their route, duration, and aircraft specifications. Approval can take several days.

In Armenia, the overflight permit is typically granted within 24 hours, but it's essential to file your request in advance with detailed flight information.

For Azerbaijan, applications must be submitted to the State Civil Aviation Administration. A minimum of three days Brunei Overflight Permit Procedures is recommended for processing.

Bangladesh mandates that all foreign aircraft obtain a permit at least 48 hours before the flight, ensuring all details are provided to the Civil Aviation Authority.

Bhutan has strict regulations due to its mountainous terrain, requiring a specific application process through the Ministry of Information and Communications.

In Brunei, overflight requests are generally processed quickly, but pilots should confirm details with the Civil Aviation Department.

Cambodia requires foreign aircraft to apply for a permit via the State Secretariat of Civil Aviation, usually taking about three days.

Lastly, China enforces stringent airspace controls, necessitating at least five working days for permit approval, making early applications essential.

Understanding these procedures will streamline your flight planning, ensuring a smooth journey through these diverse airspaces. Always check with local authorities for the most current regulations before you fly.