Two-thirds of online retailers said the deadline to place orders for ground shipping with delivery by Christmas is Dec. 18, according to the 2007 eHoliday study.

The survey found that most retailers’ free ground shipping offers (76.1 percent) will expire on or before that day.’s, provides a list of retailers still offering free shipping for delivery by Christmas.

“Online shopping continues to become more convenient for consumers,” said Helen Malani, of Shopzilla. “Almost three-quarters of retailers surveyed plan to increase their fulfillment operation hours, and two-thirds planned to add fulfillment staff for the holiday season. Retailers will continue to update special sections of their site to help customers quickly find what they are looking for when shopping online.”