Cirium’s new annual award is presented to an airline with outstanding performance considering the complexity of the airline’s operation, volume of flights, diversity of its network and other key operational factors.

The yearly ranking is determined by metrics such as delays, canceled flights, involuntary denied boarding and complaints. The award comes on the heels of Delta's recent designation as the most on-time airline by Flight Global for the second consecutive year. ​Veteran airline reporter Scott McCartney of the Wall Street Journal ...