U.S. and European airlines will benefit from pent-up demand for travel to China after its recent border reopening, but route approvals, fresh COVID-19 testing rules and not enough large aircraft remain barriers to rising sales, analysts and industry officials say.

Travel is returning to China, the world's largest outbound tourism market worth $255 billion in 2019, after the country ended mandatory quarantines on Jan. 8. Airfares from China are now 160% higher than before the pandemic, data from travel firm ForwardKeys shows, due to limited supply.

Iowa-based lawyer Jinying Zhan, 50, said he paid $1,600 for a one-way ticket in December to fly via Chicago and Dubai to Guangzhou.