Identify the designator code for Tokyo's Narita airport.

The designator code for Tokyo's Narita Airport is NRT. Each airport is assigned a unique three-letter IATA code that helps in identifying airports globally in a standardized manner. Narita International Airport, which serves as one of Tokyo's main international gateways, utilizes the code NRT to distinguish it from other airports in the region.

In contrast, the other options represent different airports: TLV is the designator code for Ben Gurion Airport in Tel Aviv, Israel; ICN is for Incheon International Airport in Seoul, South Korea; and SCL refers to Comodoro Arturo Merino Benítez International Airport in Santiago, Chile. Understanding these codes is crucial for differentiating airports, especially in contexts like air travel, ticketing, and logistics.