The Perfect Age?
There actually isn’t a “perfect age” for long-haul travel. International travel can work at any age (my kids started at just 8 weeks old, after their first immunizations), so you have to judge the situation, your child’s temperament, and your family’s interests. The only age I found things to be a bit difficult was during the early toddler stage when my child’s urge to roam the airplane aisles and shove every nasty thing into his/her mouth was insurmountable. Bottom line: Travel is a gift and can work at any age and stage. A wide range of exposures, both near and far, will teach your kids the invaluable life lessons of being adaptable, open-minded, exhibiting good manners, and having a sense of humor (hopefully).