society > travel > air or space travel > specific movements or positions of aircraft > fly [verb (intransitive)] > at cruising speed (2)
transferred and figurative. Esp. of an aircraft or automobile: to travel at cruising speed; of a taxicab: to travel about at random seeking business.
Of an aircraft or motor vehicle: to cruise along in a leisurely manner, usually at low speed. colloquial (originally R.A.F. slang).