When we still thought that we would have to take our then two month-old to the States, I asked my midwive, who said flying with little babies is usually really easy.
We don't have to move, quite yet, so this early trip fell through, but we will be visiting the family for christmas when our munchkin will be just over five months old.
I asked friends who took their baby to the States at five or six months old, and they told me, flying with him then was a lot easier than now (he's two years old).
When you come back, I would be interested in your experiences, maybe you'll get in touch, that would be great:
[email protected]