Most airlines will allow dry ice on their planes; however, each one has different standards and regulations.

Example: Delta
Delta will accept packages containing 5.5 lbs. (2.5 kgs) or less of dry ice when used to cool non-hazardous perishables in carry-on or checked baggage. The package must:

Meet carry-on baggage restrictions.
Allow the release of carbon dioxide.
Be plainly marked with: "Dry Ice" or "Carbon Dioxide Solid," the net weight of dry-ice material, and the contents being cooled.
Packages containing more than 5.5 lbs. (2.5 kgs) may not be accepted as carry-on or checked baggage.
http://www.delta.com/traveling_check...oods/index.jsp

If not, just send it via FedEx.
http://www.fedex.com/us/services/opt...ds/hidden.html