Southwest Airlines Named Best in U.S. for Frequent Fliers CheapOair Staff May 26, 2011 general Southwest is the Quickest In a new study released by IdeaWorks Co. consulting firm, Southwest Airlines was named as the best U.S. airline for redeeming frequent flier miles. 24 carriers were graded on how frequent they distribute free airline tickets in response to website inquiries about cashing in on frequent flier miles. The airline had a 99.3 percent mark. The average award rate for U.S. carriers came in at 68.6 percent, up from last year’s 66.1 percent mark. Source: BizJournals