In the United States, we refer to a coast-to-coast trip as a "transcontinental." In Australia, however, the better term is Nullarbor, as flights from the East Coast over to Perth cross the Nullarbor Plain, stretching along South Australia. The plains consist of flat, arid or semi-arid country with almost no trees (hence null-arbor), running along the Great Australian Bight, the open bay on the south side of the country.
Brisbane to Perth is the nation's longest domestic commercial flight, clocking in at just about 5 hours westbound and just over 4 hours eastbound. That's a good amount of time in the air to stay in just one country, and it roughly compares to a New York to San Francisco stretch. Good thing we remembered our iPad, opted for an upgrade to Business Class, and timed our napping so we wouldn't miss Nullarbor photos like this:
[Screenshot: Flightradar24/Photo: Jaunted]