Flying with babies

jessica

So I posted once about this before.but felt a little more judged then anything for even asking so I'll try a different category.

What are some other mothers experiences flying with babies under 9 months old? I see most moms hold their babies in their laps but I know you can buy the seat next to you for a car seat but its only like a 3 flight is it really worth the extra seat for a short period of time ?