Book Budget Airlines
European countries have many budget airlines operating to different destination on a daily basis. If you are not travelling from any European country then it is easier for you to find cheaper fares. However, if you are travelling from any other country and visit more than one country in Europe, you can connect your flight from the country you land first to Germany. Sometimes it is difficult to find a cheaper airline to all cities of Germany.
There are a number of popular airfare compare website. You can browse through any or every single of them, and can compare fares of different airlines. You can choose the one that offers cheaper fare. It is possible that you find a packaged ticket or some offer that can help you in getting some discount on the fare. Sometimes airlines offer packaged tickets to different countries and destination and you can be lucky to find one.
Book Well in Advance
Booking well in advance is also an option in getting discount on airfares. You should start searching for the tickets nearly a month earlier to get a cheaper flight. If you are booking through a travel agent, request them to find a cheaper ticket. They can let you know about any package or offer of cheaper tickets by any airline.
You might be able to find a cheaper flight to Germany to the destination other than the airport you are planning to land. In that case, be flexible and ask your agent to book the ticket to the airport that the airline is operating flights to, and then make further travel arrangement from there. This can be through a budget airline, train or bus. This can help you find cheaper fare.