Hello everyone, we want to fly for vacation in June. We have two child…

Hello everyone, we want to fly for vacation in June. We have two children. The eldest has no problems ? The youngest is 6 months old. He doesn't fall asleep easily, (he struggles to fall asleep in the crib, little one). He's very active himself. We can only fly maximum 5-5.5 hours. Girls, how do you teach them to fall asleep at least by rocking or breastfeeding? The elder also flew at that age, everything was fine, but with three of us I'm afraid ? Damn, maybe the child is not yet ready or what?