I would think that you would have to bring a lot of food and formula and stuff, since that probably doesn't have to meet the standards for the no more than 3 ounces for liquids rule. and plenty of diapers, if needed. and a car seat and pacifier, if needed also.
I would check airline website to see what you need for that.
Personally. Don't have kids yet so wouldn't know sorry. Dress them warm make sure you wear slip resistant shoes if you carry your child at all and don't take to widen steps to avoid slipping
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