No problem. Here's your link (if flying out of a U.S. airport but most foreign airports have similar rules).

http://www.tsa.gov/travelers/airtrav...x.shtm#formula

I also recommend that you take some sort of teething gel and/or pain reliever for your little one. The pressurization can increase swelling and pain in general so teething pain is a prime candidate. A baby who is only mildly uncomfortable on the ground can become very unhappy in the air.

Trust me on this. I have Wisdoms, which came in as an adult and hurt. Teething pain is not fun! (although getting the Wisdoms out is no picnic either but I didn't do that).