What is the designator code for Fort St. John?

The designator code for Fort St. John is associated with the airport in that city, which is the North Peace Regional Airport. The airport code is YXJ, indicating its location in Fort St. John, British Columbia, Canada. Designator codes, also known as ICAO codes, are used worldwide to identify airports and their locations uniquely. They are typically derived from the location's name or other recognizable features.

In this case, YXJ is specifically allocated to Fort St. John, making it the correct choice. The other options refer to different airports in Canada with their unique designator codes: YQU corresponds to Peace River Airport, YXC is for Cranbrook/Canadian Rockies International Airport, and YKZ refers to Toronto/Buttonville Municipal Airport. Understanding these codes can help with navigation and understanding airport locations when traveling or studying aviation geography.