Avoid pricey and long airport transfers—sometimes your best bet is a rental car

Especially in cities like Denver and Los Angeles, where the airport is a 30-minute drive from downtown, it can be cheaper to rent an economy car than to take a cab or even shuttle bus into town—and you may get frequent flier miles this way. And using your car instead of a cab for trips during your visit may increase your savings. When pricing this option, be sure to factor in the cost of parking the rental at your hotel.