I just found this report. Your family is so cute! I really hope that the plane flight goes smoothly for you. 14 hours is a long time! Do you have a lot of stuff planned to keep him busy? We took our son to Florida on a 5 1/2 hour flight when he was 21 months old and I had his bag stuffed full of things to keep him busy.
Your trip sounds wonderful! 3 weeks and all of the locations are great!