AAdvantage is offering a 50% mile credit if you register for their promo (AAUSM) and fly before 2 March 2014 on USAirways, but credit your flights to your AAdvantage account.

Details:

*AAdvantage 50% mileage bonus offer is valid for travel on US Airways, US Airways Express and US Airways Shuttle operated flights (includes codeshare flights marketed by American Airlines) for travel systemwide from January 13, 2014, through March 2, 2014. Offer applies to travel on purchased, published fare tickets that are eligible to earn AAdvantage miles. Bonus miles do not count toward elite status qualification or AAdvantage  Million Miler status. 50% bonus miles will be calculated at 50% of the base miles earned or, if applicable, the minimum mileage guarantee. Registration prior to midnight CT on March 2, 2014 is required. Travel flown prior to registration will be eligible for the bonus. Bonus miles will be awarded within 3‑4 weeks after the promotion period has ended.

You can register for the offer on US Airways here.

Details:

Eligibility:

Offer void where prohibited by law. Registration required. You must be a member of the Dividend Miles program to register for this offer.  Registration begins on January 13, 2014 and will continue through March 2, 2014. Registration may occur at any point during the promotion to qualify for any eligible flight activity. Only flight activity on and between January 13, 2014 and March 2, 2014 is eligible. Bonus miles do not count toward Dividend Miles Preferred status.

Earning Miles:

Earn a 50% mileage bonus when you register and fly an American Airlines (“AA”) operated flights on and between January 13, 2014 and March 2, 2014.  AA flight activity is defined as a segment of regularly scheduled passenger air service operated by American Airlines, Inc. including flights operated by “American Eagle” and “American Connection”.  Please note that flights marketed as American Airlines, but operated by another carrier are not eligible to receive the 50% bonus miles. Please inquire prior to making your booking if your flight is operated by American Airlines. Please ensure you include your Dividend Miles number when you’re making your booking to receive mileage credit. The 50% mileage bonus will be applied only on base miles earned for the eligible AA flight activity, excluding any other bonus miles. Please allow up to 60 days for bonus miles to post to your Dividend Miles account. Further information regarding earning miles, rules and any restrictions can be found here: Dividend Miles Member’s Guide

Eligible Activity Date:

Only AA flight activity between January 13, 2014 and March 2, 2014 is eligible (“Eligible Activity Date”). Eligible Activity Date is based on the date that AA records the flight activity (the day the actual flight activity occurred), and is not when the flight was purchased or booked.