Question : What day in the next four weeks has the best fares?
Answer : Mar 23rd has seen bookings (as of Mar 20th) as cheap as $1,175. That comes in 45% below the average price for this route. Saving now means you'll have more money in your pocket for the trip.
Question : What price range should you expect when booking from Newark (EWR) to Perth (PER)?
Answer : Ranging anywhere from $1,175 to $6,819, prices for EWR to PER do fluctuate much more than most routes from the United States. However, the sooner you book, the better price you tend to get.
Question : How long do most people visit Perth?
Answer : Of course you're not most people, but if you were, you'd stay roughly 28 days.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : The lowest-cost day to fly in April is Saturday. Flexibility is paramount when booking travel plans in order to keep travel costs down.