Sydney is one of the most easily recognizable cities on earth, owing to its legendary beaches and its peculiarly shaped opera house. Sydney is also Australia's largest, oldest, and most diverse city. Activities that visitors in Sydney can enjoy include swimming at Bondi Beach, sailing on the harbor, dining at world-class restaurants, and strolling through parks and gardens. There are also a myriad of exciting attractions that are within easy reach of Sydney, such as the Hunter Valley vineyards and the premiere ski slopes of the Snowy Mountains. If you're planning a trip to Sydney, your flight will be the biggest expense in your travel budget. To ensure that your trip doesn't break the bank, however, follow these tips for scoring cheap flights to Sydney.