How should one handle prayer times, especially Asr, when traveling by plane for 15 continuous hours and arriving long after noon?

A traveler on an airplane heading in the direction of the sun is not obligated to pray Maghrib or any other prayer, nor is he permitted to break his fast while fasting, unless the sun sets upon him while he is on the plane. And whoever travels for a long period and the time for prayer does not enter until after his arrival, then he is not required to pray it on the plane, but rather he prays after his arrival when its time enters. And the traveler must pray when the time for prayer enters, even if the duration between prayers is long due to traveling westward.