在飞机上一般用on the plane, 不用in the plane;

on the plane 在飞机上;飞机上;在平面上

例句：

He had wangled her a seat on the plane.

他为她弄到了一个飞机上的座位。

相关介绍

There was this strange man sitting next to me on the plane.

在飞机上有个奇怪的人坐在我身旁。

He was on the plane from New York.

他在纽约来的飞机上。

I managed to grab a couple of hours' sleep on the plane.

我在飞机上抓紧时间睡了两个钟头。