A.T.
Hi!
We took our daughter to Germany this past Dec when she was 10 mos old. I have flown with her twice since then after she was walking and my biggest suggestion is for the plane. Take lots of snacks and toys he has never seen before. New stuff is so much more entertaining. I would suggest this book called the Quiet Book (got mine at a yard sale but I'm sure you can google it). It has about 8 pages and is made of fabric and has different activities like buttons and zippers and tying a shoe, etc. It kept her occupied for a long time when we flew last May. I do not have a portable DVD player yet since she isn't watching tv much, but I would find out if your plane is going to have the tv screen in the seat in front of you or if there is only a large tv. If I were flying now, I would probably buy a portable dvd player for my daughter because 8-9 hrs is SO long. I also experimented with all kinds of new snacks and eating kept her busy too.
As for travel suggestions while there, take a stroller that reclines - try to find an umbrella-type stroller since it takes up less room, but there has to be one that can recline. I FORGOT our umbrella stroller and had to buy one while I was there! I realized it as soon as we arrived at the airport, I was so upset. They do not have $10 strollers over there, we had to spend $150! Anyway, the reason you need the recline is you will not see folding changing tables in the bathrooms, at least not very often. In major department stores you will find them but almost never in a restaurant. So I used the stroller to change her a lot.
Good luck and HAVE FUN!!!
~A.