Airline code-sharing and its effects on on-time performance

Although airline on-time performance has always received much attention, we are unaware of any empirical research that measures the on-time performance effects of domestic airline alliances. In this study, we empirically investigate the on-time performance effects of the largest domestic alliance-between Delta Air Lines, Northwest Airlines and Continental Airlines. We find evidence that code-sharing improves alliance partners' on-time performance and that the size of the codeshare effect on on-time performance depends on pre-alliance competition in a market, with the effect being larger in markets where the partners competed in prior to the alliance.