Members of Diners Club Rewards can earn a 50 percent mileage bonus when exchanging Diners Club Rewards points for Frontier Airlines miles between Sept. 1 and Oct. 31, 2007 or Midwest Airlines miles between Oct. 1 and Nov. 30, 2007.

When you convert your Club Rewards points to Delta SkyMiles between Oct. 1 and Dec. 31, 2007, you will receive: 10 percent mileage bonus when you transfer 20,000 to 39,000 points; 25 percent mileage bonus when transferring 40,000 or more points.