Global travel becoming the 'normal' for more families

Its outbound packages departing over the National Day holiday had already sold out by early September, Cheng said.

Jiang Yiyi, director of international tourism development at the China Tourism Academy, said that the arrival of the high-speed railway network has made traveling by train a far more popular way for residents from small cities, especially in central and western China, to reach their outward destination airports.

"The network has shortened the distance from inland cities to port cities, for instance," said Jiang.

The setting up of consulates by some countries in smaller cities has also made it more convenient for local residents to gain travel visas.

Italy, for instance, established a visa center in early 2015 at its consulate in Chongqing, a major city in southwest China, to serve residents from there and nearby provinces, such as Sichuan, Yunnan and Shaanxi.

Jiang said for many Chinese people, regular international travel has become a norm, more than a treat.

"Outbound tourism is just another daily consumption for some Chinese residents, no matter whether they live in big cities or small ones," she said.

Cheng Weimin, general manager of Jiangxi Overseas Tourist Corporation, a State-owned travel agency in the province, however, says the biggest hurdle still existing for residents of smaller cities traveling abroad is the relatively narrow capability of local travel agencies.

Many still have to cooperate with larger agencies in bigger cities as they can only offer relatively few overseas destinations, especially in Europe and the US, said Cheng.

The added effort needed to travel to hub cities, and then onto faraway destinations, is also a major consideration for China's growing international travelers.

"We gave up on my original plan to go to the United States this year," said Zhang Yun, a 28-year old female doctor living in Lanzhou, Gansu province, who was planning to travel with her elderly parents, "as there were no direct flights from the city to the US.

"The cost was too much for that added travel, so we decided to go to Thailand instead."

Jiang Yiyi, from China Tourism Academy, remains confident, however, more direct international routes will be introduced in coming years, as domestic and foreign airlines and online travel agencies pay closer attention to the small-city market.

Yu Dunde, CEO of Tuniu.com, a listed online travel agency, said departures from second-tier cities are already contributing strongly to its total bookings and expects more second and third-tier cities to be included in its future offerings.