You will be just fine. I started flying w/ DD at 5 1/2 months. At age 2 1/2 we flew 10 hrs to Hawaii.

Here are my best tips.
1. Pack herfavorite snacks. Nothing saves the day like food.
2. If you use a pacifier take it and 10 spares. Make sure they are sucking on it during take off and decent. If they don't take one make sure they have a sippy cup/bottle to drink out of during take off and decent. Fill it up after you pass through security.
3. You don't need a DVD player for that short of a flight. DD never had one until she was 6 and we were going to be in the car for 12 hrs in one day. (This coming from a mom who has a TV addict for a child)
4. Bring a few books to read to your child.
5. SURPRISES!! There is nothing like having some surprises in the bag. DD still expects me to pack surprises. (Sticker books, color wonder markers, etc)
6. Pack their security blanket (Whatever is their comfort item)
7. Pack their meds in your carry-on. Take children's tylenol, children's benadryl (I have a fear of having an allergic reaction on a plane) and any cold meds your child might need just in case.

8. Pack two changes of clothes for her and one for you. (or make sure you carry a changing pad thing to sit on your lap just in case of an accident) Make sure those are packed in a big zip lock container. That way if there is an accident you have a bag to put wet clothes in.
9. Pack enough formula, diapers and wipes for 48 hrs. Trust me. If something happens and your flight is delayed or you get in late you will be thankful that you over packed.
10. Pack a blanket for your daughter for the flight. Planes are either hot or cold.
11. Relax you are going to be just fine!! I know it's stressful the first time you fly with your child. Allow extra time to get through security. That is going to be the toughest part. Be sure to buy a bag to put your child's carseat in to check for the flight. If you are lucky like me most of the flights we took put my daughter right to sleep!!
Also if your child does use a sippy cup make sure you put it in a ziplock bag!! They leak d/t the changes of pressure in the cabin. Also make sure your lids are on your bottles good because they will really leak.
