Despite the fragility of the economic recovery, strong demand from corporate business travelers has helped drive better-than-expected revenues for U.S. airlines battered by high fuel costs. The American Express global travel forecast for 2012 predicts jumps in business-class fares as companies seek to secure new accounts. "People want to make sure that they're out there talking to their clients," said Megan Costello, managing director at Association of Corporate Travel Executives.