由于睡眠不足，乘客下飞机时大多困倦不已、眼睛发红，所以red-eye就有了夜间航班之意。

【例句】
He decided not to take the red-eye flight home but to wait and take a nine o'clock flight the following morning.
他决定不乘夜航航班回家，而是留下来搭第二天早上9点的飞机。

We took the red-eye to boston.
我们乘坐夜间航班飞到波士顿。