A 7-day trip to Australia has an average rate of $1,955 for one individual traveler, $3,357 for a couple, and $1,725 for a 4-person family. Australian hotels range between $55 and $238 per night for an average of $92, while most holiday rentals will cost between $180 and $510 a night. If you're curious, you can also check out Top 10 Most Popular Boats in Australia | Buying Guide