Flight endurance record

The limit initially was the amount of fuel that could be stored for the flight, but aerial refueling extended that parameter.

Due to safety concerns, the Fédération Aéronautique Internationale (FAI) no longer recognizes new records for the duration of crewed airplane or glider flights and has never recognized any duration records for helicopters.

(dd:hh:mm:ss) Not an FAI category.

See Longest Flights 271 crossings FAI does not differentiate between non-refueled and solar aircraft.

Class U : Experimental Duration that a specific person continuously occupies the spacecraft while in orbit.

The current record for the longest non-stop, non-refueled airplane flight in history (9 days and 3 minutes) was achieved in the Rutan Voyager
The Cessna 172, used by Robert Timm and John Cook, hanging in Harry Reid International Airport.
Robert Timm and John Cook Cessna 172 refueling
The aircraft Curtiss Robin "St. Louis" during the record flight July 13–30, 1929, St. Louis, Missouri.