Question

是on the airplane还是in the airplane?

Answer 1

我也很迷茫，不过找到一些例句，你看看有没有用吧。

1.in the airplane
（1）William Palmer says without the postal workers' intervention, the puppy would certainly have died in the airplane's unheated and non-pressurized cargo hold.

MSN: Minneapolis woman charged in puppy-mailing attempt

（2）"Everyone was screaming in the airplane from happiness, " one passenger who flew from the Dutch capital to New York told the news agency AP.

BBC: News - Half of Europe flights expected to go ahead

（3）But under the FAA's new directive, any passengers who happen to be in the airplane restroom should such an event occur would no longer have immediate access to oxygen.

MSN: FAA: No more emergency oxygen in airplane lavatories

2.on the airplane

（1）If your bag is too big, you don't get to bring it on the airplane.

CNN: Carry-ons could clog holiday travel

（2）"We believe that the device was designed to go off on the airplane, " Mr. Cameron said.

WSJ: Yemen Bomb Plot: Explosive Found in U.K. Strong Enough to Bring Down Plane

（3）I've grimaced and sneezed when someone beside me on the airplane unwraps a sandwich dripping with cheese.

WSJ: An 'Allergy Girl' Comes Out of Her Bubble

Answer 2

on the airplane