The sketch of the mathematical modeling for the Calcalation of the distance covered by an airline is discribed.Some comments to the answer paper for the problem C of 2000 China undergraduate MCM are given.

• 本文对飞机航线飞行距离计算的数学模型进行了概述，并对2000年全国大学生数学建模竞赛的C题答卷进行了评述.