According to Hitwise, a leading online competitive intelligence service, the top 20 most visited websites for the travel industry this March were MapQuest, Google Maps, Expedia, Yahoo! Maps, Southwest Airlines, Travelocity, Orbitz, Priceline.com, Cheap Tickets, Yahoo! Travel, American Airlines, Hotwire, Delta Air Lines, TripAdvisor, Kayak, Hotels.com, Local Live, VacationsToGo.com, Northwest Airlines, and United Airlines.

The Hitwise travel category lists those sites which are related to travel and the travel industry, including publications, travel agencies, transport services/people carriers, airports, destinations, resorts, travel and locality guides and accommodation. 
         
Hitwise monitors a range of Internet Service Provider (ISP) networks to capture the usage patterns of Internet users. For more information visit hitwise.com.