Delta Air Lines plans to reduce the number of weekly flights it operates between the U.S. and Seoul-Incheon (ICN) South Korea, due to coronavirus (COVID-19) concerns, the U.S. major carrier said Wednesday. Delta, which already suspended all service to China as of February 5, said it will suspend service between Minneapolis/St. Paul and Seoul starting on February 29, with the last flight departing MSP for ICN on February 28 and departing ICN for MSP on February 29. Delta will also reduce to five times weekly its services between ICN and Atlanta, Detroit and Seattle through April 30. The airline’s new service from Incheon to Manila, previously scheduled to begin March 29, will now start on May 1. The airline said it would release full schedule details on its website starting February 29.

“The health and safety of customers and employees is Delta's top priority and the airline has put in place a number of processes and mitigation strategies to respond to the growing concern,” said the airline in a written statement. “Delta remains in constant contact with the foremost communicable disease experts at the CDC, WHO, and local health officials to respond to the coronavirus as well as ensure training, policies, procedures, and cabin cleaning and disinfection measures meet and exceed guidelines.”

South Korea now has seen the most cases of the new coronavirus outside China. The Washington, D.C.-based Centers for Disease Control and Prevention on Monday raised its travel advisory for South Korea to its highest level after the number of confirmed coronavirus cases in the country exceeded 800.

According to the CDC, travelers should avoid all non-essential travel to the country, where officials on Tuesday placed the number of cases at almost 1,000.