What is the ICAO code for Sydney Kingsford Smith Airport?

• A. YSSX
• B. YSSY
• C. SYYX
• D. YSSW

Answer: (B)

ICAO codes are four-letter identifiers used in flight operations to pinpoint a specific airport. In Australia the prefix is always Y, and Sydney Kingsford Smith’s official code is YSSY, a unique four-letter string that identifies that airport in routing and air traffic systems. The IATA code for Sydney, which you might see on tickets or baggage tags, is SYD, and it’s a separate, three-letter code from the ICAO code.

Why this one is the right fit: it follows the Australian pattern (starting with Y) and uses the exact four-letter assignment that corresponds to Sydney Kingsford Smith, ensuring it uniquely identifies that airport in official aviation contexts.

The other codes don’t fit for Sydney: those that start with YSSX or YSSW would indicate different airports in the region since the final letter distinguishes among airports, while SYYX begins with a letter not used for Australian ICAO prefixes, so it wouldn’t be Sydney in Australia.