To shorten and combine prayers,

Q 1: A man traveled from America to Japan and then to Indonesia. He saw no night on throughout his travels, rather the entire journey occurred during daylight. When he reached his destination, a day had passed. What should he do to make up for the Salah (Prayer) he had missed? What should he do when he goes on the same journey again?

A: This man should make up for the missed Salahs immediately. As for the future, he should offer each Salah on time using a watch to estimate its time, even if he is flying in a plane. (Part No. 8; Page No. 106) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.