My son's first trip was when he was 2 months old.Also going home to see grand parents.
I think unless your child have any special needs, otherwise it is so easy to travel with a small child before they can walk. How old is your child now?
I think it is easy to keep the baby sitting in the plane. If the kid growth older, such as 9-10 months, he/she will keep on moving and not suggest to have long haul trip.
when she was few months old, i was worried she might feel discomfort in such long flight, and now, shes almost 1 year old, i am afraid she will even more 扭計