Dear parents, how early do u plan for an overseas trip (taking flight) with your baby?

Hi, We took our baby to California when she was just two months old. The flight was too long but she coped well. Just make sure that you have everything that a baby would need. Since my baby was breastfeeding then, I did not have to do much preparation apart from her diapers and clothes. I mean no feeding bottles and no tension about sterilising them.