The duration of an airport shuttle bus service from Clarkson to Perth Airport can vary depending on traffic conditions, the specific route taken, and the number of stops along the way. On average, you can expect the journey to take approximately 45 minutes to 1 hour under normal traffic conditions. However, it’s advisable to check with the shuttle service provider for the most accurate and up-to-date information on travel times, as they may have different schedules and routes.