A J.D. Power & Associates survey found the customer-satisfaction ratings of North American airlines rose 15 points from 2009 to 673 on a 1,000-point scale. The improvement comes as air fares declined, flights arrived on time more often and less luggage was lost. "There have been fewer passengers and less congestion," said Stuart Greif, general manager for global travel and hospitality at J.D. Power. "Now fares are starting to pick back up, and as more passengers return to the skies, it remains to be seen whether those gains will be short-lived or airlines can build on them."