This study investigates the entry route choices of low‐cost carriers (LCCs). A LCC considers whether to enter a spoke route or a rim route of a major carrier's hub‐spoke network. Under a Cournot schedule competition model, we demonstrate that rim entry is more profitable for LCCs if connecting passengers' hub‐through additional travel time cost is large, and spoke entry is more profitable if this time cost is small. Welfare analysis shows that rim entry is socially preferable when the time cost is large and that spoke entry is socially preferable when the time cost is small. In a certain range of time costs, however, LCCs choose spoke entry even though it is not socially preferable.