Travelers have found that booking a Sunday departure is the best way to save up to 1% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.
It’s optimal to fly from Cincinnati to Perth in the afternoon. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the morning.
This is defined as Cincinnati Cinci./N. Kentucky Airport (CVG) and Perth Airport (PER). Codes like Perth Airport are often used to just call airports uniquely.