Used in a sample sentence: "We’ve now reached our cruising altitude of flight level three-three-zero. I’ll go ahead and turn off the seatbelt sign…"
Definition: "There’s a technical definition of flight level, but I’m not going to bore you with it," Smith wrote.
According to the long-time airline pilot, flight level is simply a fancy way of saying how many thousands of feet the plane is above sea level.
"Just add a couple of zeroes. Flight level three-three zero is 33,000 feet," he explained.