YOU SAID:

there is no room on the plane

INTO JAPANESE

飛行機には余裕がない

BACK INTO ENGLISH

I can't afford a plane.

INTO JAPANESE

私は飛行機を買う余裕がない。

BACK INTO ENGLISH

I can't afford an airplane.

INTO JAPANESE

私は飛行機を買う余裕がない。

BACK INTO ENGLISH

I can't afford an airplane.