[Techtaffy Newsdesk]

For the full 2012 year, U.S. travel e-commerce sales reached $103 billion, an increase of 9 percent versus the prior year, according to comScore. Air Travel accounted for nearly two-thirds of all travel spending, while growing 10 percent compared to a year ago.

John Mangano (VP, Marketing Solutions, comScore): Travel is a leading online commerce category, and despite being a pioneer in the sector 15 years ago it is still growing at nearly double-digit growth rates and remains very competitive.

Top Airline Sites in 2012

Once again, Southwest Airlines led all airline sites in 2012 with 20 percent of category page views, up slightly from the prior year. Delta Airlines ranked second at 15.5 percent of page views, followed by United Airlines at 14.7 percent (up 4.9 percentage points), American Airlines at 13.2 percent and US Airways at 3.4 percent.

Top Online Travel Agent Sites in 2012

Expedia  (which includes Hotwire) ranked as the top property in the Online Travel Agents category with 31.6 percent of all category page views, followed by  (17.3 percent) and Orbitz Worldwide (12.9 percent). Fareportal Media Group, which includes CheapoAir, ranked fourth at 9.2 percent, while Travelocity rounded out the top five at 7.6 percent. Recent 2012 IPO was one of the biggest share gainers in the category, jumping 2.2 percentage points to 6.9 percent share of all page views.

Top Hotel & Resort Sites in 2012

Marriott led the Hotels & Resorts category in 2012 with 11.7 percent of all category page views, roughly on par with its share in 2011. InterContinental Hotels Group ranked second with 7.9 percent share (up 3.5 points), followed by Wyndham Worldwide at 7.5 percent. Hilton Hotels (7.0 percent) and (6.5 percent) rounded out the top five.