When I was first given my flight details from my OH's company I groaned, it was going to take us 30+ hours to get to perth from aberdeen. It turns out though that it worked brilliantly. We got our first flight from aberdeen to heathrow just after tea time so we had our tea at the airport and jumped on the flight, ofcourse this was the exciting bit for the 2yo as he had never been on a plane before, we deliberately kept him awake untill we got on the second flight to Hong Kong and by this time it was about 10pm so he was shattered and slept the whole flight till about an hour before we landed so that was basically his nights sleep. We had a wait of 7 or so hours in Kong Kong and in this time we got food and found a kids play area and had him running around and playing and again kept him awake until the next flight. Once we were on the last leg of the flight he was sleeping before the plane had even taking off so in affect was having his afternoon nap and when he woke up he was quite happy watching Barney on the tv with his earphones on. I took a whole trunki full of things onto the plane for my son but barely used any of it apart from the clothes and pyjamas, nappies etc. Try not to stress too much, it wont be nearly as bad as you imagine it can be.