Statistics

Flight levels

Everything computed from 94 saved flights. Figures that need a recorded track are based only on the flights that have one, and the number is stated wherever that matters.

Flight levels

Time actually held at a level, within tolerance, for at least two minutes

Classified cruise time 212 h 41 min across 39 flights

Unclassified 76 h 41 min Climb, descent and uncertain gaps

Highest level FL470 1.1 step climbs per flight

Levels per flight 2.6 On average

At or above

Cruise time held at a level or higher, not seconds spent climbing through it

Level	Cruise time at or above	Share of cruise	Flights that reached it
FL370	208 h 59 min	98.3%	33
FL390	208 h 26 min	98.0%	33
FL400	203 h 52 min	95.9%	32
FL410	164 h 29 min	77.3%	31
FL430	88 h 50 min	41.8%	22
FL450	9 h 20 min	4.4%	5

Time by flight level

Percentages are of classified cruise time

A level counts only when the altitude holds inside its tolerance band for a contiguous stretch. Crossing a level while climbing is not cruise time at that level, and time that cannot be attributed with confidence is counted as unclassified rather than assigned to the nearest level.