I stopped in Moscow only to change planes.

我为了转机才在莫斯科停留。

《牛津词典》

Do I have to change planes?

我要不要换飞机呢？

youdao

Do I have to change planes at Karachi?

我得在卡拉奇换机吗？

youdao

For example, Susan Godfrey of Morristown, New Jersey, was recently returning home from a trip to Alaska, which required a stop and change of planes in Seattle.

BBC: Is travel insurance right for you?

Several hours and a change of planes north of YVR, the gnomelike Swiss pilot flying the Grumman Goose to King Pacific Lodge is holding forth about Sasquatch (he's seen one from the plane) and spirit bears and avalanches.

FORBES: Life

That can't change until all planes have more accurate navigation systems.

FORBES: Technology