US Airways is offering 250 bonus miles for all tickets that are booked on usairways.com and include at least one US Airways operated segment. You can register for this promotion here.
This offer is valid for tickets issued by October 31 that are paid using MasterCard. Travel needs to be completed by December 31, 2013 to be eligible for the bonus miles.
You can earn this offer unlimited times and paying by any MasterCard card (no requirement of using US Airways one) is ok.
Conclusion
If you have booking and travel coming up on US Airways by the end of the year, it makes sense to collect these extra miles and pay for the tickets using a MasterCard.
Here are the terms and conditions of this offer:
Online registration is required at usairways.com/MCDM. You must purchase a ticket on usairways.com April 1 – October 31, 2013 for travel April 1 – December 31, 2013. At least one segment of your booking must include a US Airways or US Airways Express operated flight. Award travel and travel with our airline partners does not qualify. Use a valid MasterCard card to get 250 bonus miles for every booking made on usairways.com. US Airways will award miles 6 – 8 weeks after travel has been completed. All Dividend Miles terms and conditions apply. MasterCard and the MasterCard Brand Mark are registered trademarks of MasterCard International Incorporated. ©2013 MasterCard.