How is the prayer performed on an airplane?

Question:
This person is asking about how to perform the prayer on an airplane?

Answer:
He prays according to his circumstances: if he is able, he prays standing, bowing, and prostrating, like on a ship, similar to the person on a ship or a steamer. If he is not able, he prays while seated, making gestures with his head, facing the qiblah in the obligatory prayer. He turns with the airplane toward the qiblah. If the airplane is heading in the direction of the Ka'bah, he faces the Ka'bah, in the direction... and it is moving –the airplane–. If the airplane is heading in a direction other than the Ka'bah, for example, heading from Jeddah to Riyadh, he turns and faces the qiblah. And so it is in other countries; he seeks the qiblah in whatever direction: south, north, west, east. He turns with the airplane, in the obligatory prayer.
As for the voluntary prayer, it is sufficient for him to face the direction of his travel. In the voluntary prayer, his qiblah is the direction of his travel.