It is obligatory upon the Muslim who is upon the airplane when the
prayer comes in to pray it to the best of his ability. So if he is able
to pray standing, bow, and prostrate, then he does so; and if he is not
able then he prays sitting and he indicates his bowing and prostrations.
If he can find a place within the plane wherein he is able to stand and
prostrate on the ground instead of indicating (these movements) then
that is obligatory upon him, due to the statement of Allah, Glorified be
He: “So fear Allah as much as you are able.”