Cities and islands in Southeast Asia, including Singapore, Phuket, Bangkok, Bali, Chiang Mai and Kuala Lumpur, have been included on the list of destinations with the largest number of hotel bookings, along with London, Ctrip said.

In late August, the peak for overseas hotel reservations for the National Day holiday occurred. Early bookings and greater demand have lifted average prices of overseas hotels, which are higher than the same period last year, Ctrip found.

Chiang Mai, in Thailand, saw average hotel prices during the National Day holiday jump 20 percent year-on-year. Singapore, London and Bangkok saw their prices climb about 10 percent, Ctrip said.

"Chinese consumers are increasingly pursuing travel experiences that are comfortable, unique and specially tailored, especially young consumers born in the 1980s and 1990s, following the ongoing consumption upgrade trend in the country," said Neil Wang, president of consulting company Frost & Sullivan China.