I am not a single dad, but my wife is in the military and I had to make the decision to leave the airlines recently because I wasn't getting enough time with my daughter and now there is another on the way. I am back to corporate flying (and pretty much part time at that).

People do it all the time, and it is especially nice that you have a good relationship with your ex. Do you guys live close to each other? That would be the big thing in my mind. Then it might be more like having two parents at home in a sense because you can leave your son with the ex when duty and work calls. Otherwise, to be honest, I would say it is going to be a pretty sucky life for you and your son if spending time together is what you are looking for. Of course, it all depends on your seniority. I passed up several upgrades to keep my schedule, but when the wife deployed, it was all out the window.

I don't know how people with two working spouses make it in this industry when family is their biggest priority. Me personally, I have decided that time with my daughter was worth leaving all of my time and hard work behind. I loved my company and I miss it almost everyday. But I will never get this time back with my kids and I seriously doubt the airline misses me much as I miss the kids when I go away.

Good luck either way.