K.F.
We took my son, who is now a year old, to Mexico when he was 8 weeks old, again when he was 12 weeks old, and again when he was 11 months old. He did absoultely awesome all 3 times! At 8 weeks old that is when he started sleeping through the night. When we brought him at 12 weeks old, my brother and sis-in-law also brought their 2 1/2 yr old and 11 month old. All of them did great. Bring LOTS of distractions/snacks for the plane ride - if you don't plan on getting her her own seat (which if you can afford it would be the best option), ask before you board if there are any empty seats - they will give it to you if you ask. A lightweight stroller is a necessity and also make sure to bring your own baby sunscreen (it tends to be awfully expensive in other countries). Just to let you know as well, they will charge you taxes to bring your child if they don't get their own seat - this can be kind of expensive depending on what the flight is. Anyhow, your daughter will have an awesome time and since you are going with other family members, it will be so much easier because you can all take turns caring for her so everyone can have a great relaxing time. Jamaica is a beautiful place - how fun!! Have a great trip! Oh yeah, and you will probably need to get her a passport - we got one for my son as soon as he was born - some places allow you to still just bring a birth certificate, but they are doing away with that law. They can take a while to get, so apply soon. If you have any other questions about traveling internationally with a baby, message me!
K.