How long should you wait to smoke after an extraction? "
As your doctor, I would tell you to wait forever! However, I understand that in the real world this isn't always possible. I would recommend 7 days without smoking. The idea is to give your body a chance to get healing well on the way before you start smoking again. Cigarettes have been shown to cause constriction of capillaries and thus reduced blood flow and immune response to the healing surgical site. This results in higher chances of post op infections -- more commonly known as the dreaded DRY SOCKET!
How long should I wait to have my wisdom teeth removed after having a baby?"
You should discuss this question with your OBGYN. There are no contraindications to having your wisdom teeth removed following child birth; considering that your delivery was without complications. Generally you should wait until you have healed adequately from child birth to handle an additional procedure. I would say at least 2 weeks.
How long should my son wait to fly commercially after wisdom teeth extraction?"
It would probably be best to wait until your son is able to comfortably take care of his own needs. This would depend on if he is or is not taking prescription pain medication and his reaction to it. Generally, most patients are ready to fly within 3 - 4 days. It might not be the most comfortable flight; however, there are not contraindications to flying (as long as he isn't the pilot)!