[Machine] We used to travel with the Prophet (PBUH), so when we would ascend, we would say Takbeer (Allahu Akbar) and when we would descend, we would say Subhan Allah.
كُنَّا نُسَافِرُ مَعَ النَّبِيِّ ﷺ فَإِذَا صَعِدْنَا كَبَّرْنَا وَإِذَا هَبَطْنَا سَبَّحْنَا