100 Free Delta, United, Aeromexico, or Hawaiian Miles
PointsHound is a website that awards frequent flier miles on Delta, Hawaiian, United, and Aeromexico when you use their website to make a hotel booking. They are currently offering 100 miles in any of these programs for new member sign ups on their website. The miles are in exchange for being referred by an existing member, so feel free to start a conga-line with your link in the comments section. However, the referrer only receives points when a new member makes an actual booking. Remember, most hotel loyalty programs will not award points for bookings made through third party sites like PointsHound, so stick to their site only if you plan on staying at a non-chain property. For those non-chain hotel bookings, you’ll earn around 4x miles for your first few nights, around 6x miles after booking 5 room nights, and around 9x miles after 20 nights. In any case, this is 100 free UA, DL, or HA miles.
3x TrueBlue Points
JetBlue is currently runing a 3x TrueBlue promotion. TrueBlue members who register earn triple TrueBlue points (12 points per dollar spent when you book on jetblue.com) by booking and flying by November 15, 2012. There is no limit to the number of times you can earn triple points during this period. Remember, you must register for triple points before booking your flight.