Where to look for cheap flights ?

Social media is extremely useful when searching for cheap flight tickets. Many people travel on a regular basis and know exactly when they can expect discounts or when a flight ticket to, for instance, Vienna will be cheaper. It's worth joining travel groups on Facebook or Internet forums and use other people's hints. Sometimes Internet users want to sell their plane tickets, while others seek travel companions. Booking air tickets with a person who is a member of a loyalty club of a given airline guarantees a lower flight ticket price.