J.F.
I have two little boys and have taken many trips with them on planes since my oldest was 4 months old (he is now 4 years old). You can bring a stroller and they will check it at the gate to the plane. You can also bring a car seat (either check it or bring it on the plane) or hold him in your lap. If you are not planning on purchasing a seat for him, I am not sure if you will be able to bring the car seat on the plane with you. I have never brought a car seat unless I have purchased a seat. I would suggest calling the airline the day before the flight and see if it is full booked or if it looks like there will be empty seats. At Thanksgiving and Christmas, I doubt there will be many empty seats. Also bring a birth certificate or shot records from your doctor's office to verify his age. Even though he clearly looks under two, some airlines have become strict about verifying age through documents (I have found that skycabs do not care much about documentation). When you check in you will have to fill out a form that you are carrying an infant but that is it. When I travel, I bring books, snacks, and drinks and small toys that will keep my boys occupied. When you go through security, make sure to take any drinks out of your bag and put them in a plastic bin to be screened. They will allow you to bring drinks for kids but they want them out of the bag.