If you are preparing for airport travel over the holidays, consider wearing your baby rather than pushing a stroller. It is much easier to move through a crowd, and your baby will likely be happier up near the faces in the crowd rather than surrounded by a sea of legs.
Very young children might be bothered by the busy-ness and crowds at the airport. Babywearing gives your child a place to tuck into a familiar space and hide against you. Or, for a more adventurous child, babywearing gives your baby a good vantage point to see all of the excitement.
Choose a carrier that is very easy to get on and off. You may need to remove it at security and carry your baby through in your arms. Some parents find that they are allowed to wear an all-cloth carrier (like a mei tai), but you will certainly have to remove a ring sling because of the metal rings. Be prepared just in case.
Choose a carrier that is comfortable. If you have to stand for a long period of time or if you plan to wear the carrier on a long flight, you will be glad you considered comfort. I wore a ring sling on every flight with a baby, and it was very easy to nurse or get up without too much fuss.
Front carry or back carry? You might find back carry easier as you check in or claim bags, but a front carrier will make it easy to just scoot into your seat if you are flying with your baby on your lap. A baby carrier that makes either easy is a good choice for air travel.
Greet the flight attendant. I think I’ve already told the story of me getting hassled for holding my baby in a sling on my lap on an Air Canada cattle car from Toronto to London. If you are going to have your baby on your lap, my advice is to board early and make sure the flight attendant sees your carrier and knows how you are going to use it. It’s better than having them threaten to turn around because you are a breastfeeding, babywearing threat to the flight. (I got to have a chat with the pilot while I defiantly breastfed. They didn’t turn around.) I understand that most flight attendants are better informed about breastfeeding on a plane now, especially to relieve ear pressure during take off, but just prepare yourself to calmly explain your carrier to avoid an incident.