Package tours are simply a way to buy airfare, accommodations, and other elements of your trip (such as car rentals, airport transfers, and sometimes even activities) at the same time and often at discounted prices.
For trips to Chicago, the best sources for package deals are the airlines. Most major airlines offer air/land packages; you'll find the best range of choices with American Airlines Vacations (tel. 800/321-2121; www.aavacations.com), and United Vacations (tel. 888/854-3899; www.unitedvacations.com). Several big online travel agencies -- Expedia, Travelocity, Orbitz, Site59, and Lastminute.com -- also do a brisk business in packages.
