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