Google has joined hands with AirTran, Delta and Virgin America to provide free Gogo Inflight Internet to their passengers throughout the holiday season.

Travelers flying on AirTran, Delta or Virgin America between November 20, 2010 and January 2, 2011 can enjoy free Wi-Fi on any of their domestic flights to check email, watch videos and surf the web from 30,000 feet above the ground.

The three airlines are said to have outfitted their entire domestic fleet (i.e. in the U.S.) with in-flight Wi-Fi.

Gogo Inflight Wi-Fi is powering the in-air Internet access.

Google expects the promotion will provide free Internet service to over 700 planes and about 15 million passengers this holiday season.

This is the second straight year that Google has provided free Wi-Fi to travelers over the holiday season. Last year, Google partnered with Virgin America and some 50 airports to provide free Internet both on the ground and in the air.