United has joined Facebook and is looking for friends and fans. To celebrate the launch of their Facebook page, the airline is giving away two roundtrip coach tickets to the lower 48 states every week through Sept. 22, 2010. For a chance to win, visit the United Airlines Facebook page and click that you “Like” United. You will be taken to a short registration form to complete in order to enter the sweepstakes. The free tickets include base fare only and winners will be responsible for all taxes, fees and carrier-imposed surcharges. The free tickets are valid on United and United Express flights and travel must be completed by Sept. 1, 2011. As a plus, you will receive Mileage Plus miles when flying on the free tickets. You can register for the sweepstakes once a week at http://www.facebook.com/unitedairlines

Bottom line: Visitors to United’s Facebook page will find links to United and the Mileage Plus program, along with information about the airline and the latest news. You can leave a message on United’s Wall or click Notes. If you scroll through the Notes, you will find a helpful post from United titled “Mileage Plus Miles: Redemption Tips” that posted on Aug. 4. Read the comments section to find additional tips from members.