Among the largest airlines, US Airways has been one of the most aggressive in its recent frequent flyer marketing.
In addition to its recurring 100 percent bonus for purchased miles, US Airways offered double miles—including elite-qualifying miles—on all flights between April 13 and June 15, and had an elite status promotion in effect through October 10.
In these days of route-specific bonuses and 10 or 20 percent discounts for purchased miles, US Airways' offers have been standouts.
The airline's latest offer is pretty generous as well, especially if you have a US Airways-affiliated credit card.
Between October 15 and December 15, Dividend Miles members will earn a 50 percent mileage bonus for flights charged to a MasterCard, and a 100 percent bonus for flights charged to a US Airways MasterCard.
Qualifying flights must be booked on usairways.com, and registration is required.
Deal or No Deal
As with another recent US Airways promotion, this one is for any US Airways flight, in any class of service, at any time during the promotion period.
The potential negative is the MasterCard requirement. If you already have a MasterCard, it's a non-issue. But if you don't, the offer is a non-starter, unless you stand to earn enough extra miles over the next two months to warrant signing up for a new card. That's possible, but unlikely.
Promotions linked to specific credit cards are increasingly common, which is why many travel-rewards aficionados make it a point to keep a Visa-, a MasterCard-, and an American Express-branded card in their wallets.
Reader Reality Check
Bonus miles anyone?
This article originally appeared on FrequentFlier.com.