How are prayer times estimated inside an airplane while traveling to America, and are prayers shortened for approximately two weeks in America?

The method for estimating prayer times on an airplane for a traveler has been previously explained, and what was mentioned there is sufficient without repetition. As for shortening prayers: Whoever intends to stay four days or more in a place is obligated to perform the prayers in full from the first day of arrival. The ruling of travel ceases for them, and they are not permitted the concessions of travel. This is the opinion of the majority of scholars.