If you have to fly with a baby, it is 500 times better if you have an empty seat next to you. Especially if you have a baby as long as mine. Even sleeping, his feet were right in a stranger's side. When he was awake, he was good, but wiggly, and grabbing that same stranger's hair, jacket, drink, etc. It was like wrestling a piglet. For five hours.
When we FINALLY ended up with an empty seat next to us, baby slept there the whole flight. Bliss!