Just thought it would be a good idea to leave a little update in case somebody may find it useful.
the trip went fine and I have learned the following:

1. Prepare a bottle and don't give it to the baby until the airplane is running for take off. I have prepared a bottle two times just to find out DS finished before the plane took off therefore got a lot of screaming due to ear pain (and other bottles stored at the ceiling compartment, so no access when I need them most)
   
   
2. I know now why they don't provide cots to 6m+ babys, they are TINY, anyway it seemed like the flight attendant over seen the restriction and got me one anyway, DS legs were hanging out of it but at least I had somewhere to lay him down while asleep. Sorry I just got it on the way there.
   
   
3. The most difficult thing to do during such a long flight is going to the toilet, followed by eating if your baby doesn't have a seat. I was very fortunate in finding a lovely lad who claimed to come from a huge american family who hold DS while I had my dinner. I'm going to send him flowers, he was such a good help and the more patient person in the world.
   
   
4. Americans are such lovely friendly people! I had a bit of a problem with a connection from the trasatlantic flight to the first domestic and they allwere making faces or waving to ds while waiting for the plain and when I struggled to carry all baby's things, and folding the stroller. A wonderful old lady took DS into the plane while a man carried my lugagge. The people was so nice that when I was about to miss my second connection the guy sitting next to me packed all the baby toys into my lugagge while I was putting DS coat on. I don't know who he was but gosh, this trip has made me recover my faith on how good people is. (it was not lost, but such nice gestures were overwhelming)
   
   5 On the more practical side, if your baby suffers from food allergies and can't have commercial baby food, get a little lunch bag with a packet of ice but be sure to defrost the food cubes first, the planes are so cold that food was still cold when we arrive to our destiny after 17 hrs travelling. But mind you, try to get food that would last in the event of a missed connection (avoid fish, chicken, or anything that can cause food poisoning if left warm for a while- I took vegetables soups with me). Put everything you need in the lunch box: spoons, plastic bib, some wet towelets just in case, and medicines. I took formula milk already measured to be mixed with water (provided by the crew), I just prepared the bottles as as they were needed.
   
   
5. If you still sterilise, get a couple of self-sterilising bottles from Mothercare, you can wash them after use in one of the toilet and ask any restaurant at the airport if they can pop it in the microwave for a couple of minutes.
   
   
6. Jet lag is not a problem if you keep the baby awake during the first half of the trip, he will be so excited with the trip that won't go to sleep at normal hours. DS only took 2 days to start sleeping 7-7 even with the 6hrs difference in time use. But be sure not to let him sleep late on the day after arrival or allow him longer than normal naps.
   
   8 Get a little bag for baby's toiletries (a couple of nappies, cream, towelets and changing mat). Yoou can have the lunch box and the little toiletries bag under the seat without having to deal with a huge bag at your feet, just replace the nappies at every connection.
   
   
7. If somebody offers to help accept it, don't be afraid, people really feels like helping a person travelling alone with a baby, and you could be confident that your baby is safe, after all, how far could they go inside of a plain? what could they do if they are surrounded by lots of people trying to get smiles from the baby?
   
   Thank you very much for all your help and thanks specially to the generous mumsnetter who offered to lend wilkinets for the trip. Thank you very much, this trip has teach me a lot about the generous nature of people.

PLANE no PLAIN CHANDRA!!!!