The Guinness World Record for longest duration of a flight by a paper aircraft, indoors, is 27.6 seconds, held by Ken Blackburn of St. Louis.
The longest distance flown by a paper aircraft, launched indoors from the ground, is 193 feet, a record held by Tony Fletch of Wisconsin. (That distance is almost equal to the length of a jumbo jet.)
The paper aircraft with the largest wingspan was made by a team of students from the Faculty of Aerospace Engineering at the Delft University of Technology in the Netherlands. It had a wingspan of 40 feet, 10 inches. Launched from an indoor 10-foot platform, it flew 114 feet, 2 inches.
The most expensive paper airplane ever flown? It could be considered the one thrown inside one of the NASA space shuttles during a routine space flight. The fuel required to get it into space runs up the price tag, of course.
In space, where there is no atmosphere, a paper airplane would not fly but would float away in a straight line forever, or until it ran into an object of some sort.
The smallest paper airplane was an origami model folded under a microscope by a Mr. Naito from Japan who used tweezers to do the work. It was made from a piece of paper 2.9 mm square. It was mounted on the head of a needle — and did not ever fly.
Source: The Paper Aircraft Association