Another example would be Qantas flights from Los Angeles to Brisbane, Sydney and Melbourne, and flights from Dallas/Fort Worth International Airport to Sydney), generally leaving 10pm to 11pm and arriving from 5am to 8am. While they do fly during the night - this is more a product of large time zone differences - the flights take around 15 hours (giving more time to sleep) and westward flight stretches out the local length of day and night. Furthermore, as the flight crosses the International Date Line, flights arrive roughly 2 days later in local time