The best time to visit Berlin is May through September when the weather is ideal for cafe sitting, park lazing and leisurely city strolling.
Advance booking is the best way to get cheap flight to Berlin. Book 4 to 6 week in advance to grab cheap flights. Airlines such as Air Berlin, Scandinavian Airlines, United Airlines and Lufthansa offers great discounts on airline tickets. From the airport to city by suburban train, taxis a Bus is the convenient way.