哪个航空公司在这条路线上具有最佳的准时性能？
根据oag报告（六月）（6月，所有nippon airways（ana）都是通过航班次数及其准时性能的对应。'18 - may '19)
航空公司 on-time flight % total flights
ana 85.2 453,378
japan airlines 84.3 303,810
alaska airlines 80.7 456,996
singapore airlines 83.2 90,339
american airlines 76.9 2,320,441
united airlines 76.9 1,769,122
turkish airlines 74 480,773
china airlines 68.9 65,210
air canada 66.6 588,181
arrival flight data is not available, but 41.3% of the departure flights were reported late in 2018, according to oag.