Moms, who flew with babies for 8-9-10 months. How do they even handle …

Moms, who flew with babies for 8-9-10 months. How do they even handle flights? What should I take with me for a 4.5 hour flight? ? I've never flown with a baby before, it's scary, I'm worried. How do babies actually handle the heat, we're flying to Egypt. In short, a million questions and worries about the little one.