AirTran Airways in April for a sixth consecutive month was the most punctual major U.S. carrier,

with nearly 94 percent of its flights arriving at the gate within 15 minutes of the scheduled time, according to FlightStats. Alaska Airlines and US Airways tied for second, delivering 90 percent of flights on time. North American airlines aggregately posted an 81 percent on-time average, with Delta Air Lines, JetBlue Airways and American Airlines performing above average, and United Airlines, Southwest Airlines and Air Canada below average, according to FlightStats.