Definition
The phase of flight conducted at a relatively constant altitude, airspeed, and power setting, between the climb after departure and the descent toward the destination. During cruising flight the airplane is in stable, level (or near-level) flight rather than climbing, descending, or maneuvering for takeoff or landing.
Plain English
The steady, level part of a flight after you've finished climbing and before you start coming down. The airplane is holding altitude, speed, and power roughly constant.
Context Anchor
Seen when discussing normal flight phases, power settings, fuel planning, and how to manage the airplane after climbout.
Derivation
From the Dutch 'kruisen,' meaning to cross or sail back and forth. Originally a nautical term for a ship sailing steadily across an area at a working pace. The aviation use carries the same idea: a steady, sustained pace between the start and end of the journey.
Why Pilots Care
It directly affects fuel consumption, engine settings, and estimated time enroute.
Intuition Check
Cruising flight does not mean flying casually or without attention. It means the airplane is established in the steady travel portion of the flight and still requires active monitoring.
Example Sentence 1
After leveling off at 6,500 feet, the pilot reduced power to the cruise setting and trimmed the airplane for cruising flight.
Example Sentence 2
Most of the trip distance is covered in cruising flight at the planned altitude and speed.