Question : Interested in traveling in the next 30 days and want to get the lowest fare?
Answer : Since low prices are preferred, look at Apr 12th. As of Mar 20th, it's showing the cheapest ticket sales at $1,254. That is 47% below the average price for this route, so you can spend that extra money on an adventure rather than the flight.
Question : Is the price you found a good deal?
Answer : Prices for this trip tend to change a lot more than other flights from the United States. They can vary anywhere from $1,160 to $6,466. However, the sooner you book, the more you'll be able to save.
Question : What is the cheapest round-trip ticket you can get to Perth?
Answer : Virgin Australia is your best bet for finding that coveted low fare. They're offering fares as low as $1,160, while prices for other flights are as high as $6,466.
Question : How long do most people visit Perth?
Answer : Of course you're not most people, but if you were, you'd stay roughly 15 days.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : The lowest-cost day to fly in April is Wednesday. Flexibility is paramount when booking travel plans in order to keep travel costs down.