Alaska Airlines in June was the most punctual major U.S. carrier,

with nearly 88 percent of its flights arriving at the gate within 15 minutes of scheduled time, according to FlightStats. North American airlines last month on average landed 76 percent of flights on time, with US Airways (85 percent), AirTran (85 percent), Delta (85 percent), American (79 percent) and JetBlue (77 percent) posting above-average on-time performances. Southwest (71 percent), United (70 percent) and Air Canada (63 percent) performed below average.