by linkedin.com — A Qantas jet is scheduled to take off from New York Friday on a flight to Sydney that, 20 hours later, would make it the longest in the world. The test flight is expected to include pilots, crew and passengers, along with researchers watching how everyone handles the ride. Success could pave the way for regular service between Sydney, New York and London. Airlines have recently been testing limits on long-haul flights, with Singapore Airlines reviving its 18.5-hour flight from Singapore to New York in 2018.