How can one perform prayers and determine their times on a plane and in the city of Sydney, Australia, while traveling for tourism?

A traveler is permitted to shorten the four-rak'ah prayers and to combine Dhuhr and Asr, and Maghrib and Isha, either by advancing or delaying them. It is preferable to avoid praying on an airplane if possible, but if it becomes unavoidable, one must pray on it facing the Qiblah, whether standing or sitting. If a traveler intends to stay in a place for more than four days, he must complete his prayers and attend congregational prayers. Travel concessions, such as shortening prayers, combining them, and breaking the fast, are contingent upon permissible travel and are not allowed for travel undertaken for sinful purposes. Prayer times can be determined through calendars and by asking Muslims.