Mexico's commercial aviation troubles have created transportation hassles in Texas, a major market for cross-border traffic. U.S. airlines have juggled marketing and codeshare agreements, airports have seen a plunge in landing fees and passengers have been faced with reduced frequencies. The confusion comes amid growing demand following the economic recession and the H1N1 flu scare. "We're currently seeing strong demand for Mexico this summer both from business travelers and customers traveling to Mexico for vacation," says a spokeswoman for Continental Airlines. Analysts say U.S. carriers may be able to increase their market share as their Mexican counterparts struggle to regain their footing.