Folded from a regular A4 paper by John Collins and thrown by Joe Ayoob, this design set The Guinness World Record flight for "longest indoor distance flown by a paper airplane" on Feb 26, 2012. The distance: 69.14 meters (226 feet 10 inches).
Tip: use a hard object like a coin to fold the paper better. Always press and fold towards the plane's tip
Give it a shot!