Good night ? Can you tell me how long after birth is it safe to fly wi…

Good night ? Can you tell me how long after birth is it safe to fly with a baby on an airplane? I need to fly (3 hours flight) a week or two after birth… Have you had such experience? A three-month-old flew, but with a one-week old I don't even know… But in the plane I saw girls with babies sleeping through the whole flight and everything)