You must be living next to the airport if you can get your child out of bed at 4:30 to make a 6:30 flight. In my experience, when flying with a 2 or 3-year-old, the entire process from wake up and get out of the house to arrive at gate goes at about 1/2 speed. I wouldn't consider a 6:30 AM flight for the 3 of us unless we planned to stay at an airport hotel the night before.