New York (CNN Business) US airlines are giving customers more time to change their flights to China without incurring fees as the deadly coronavirus continues to spread, and as American authorities raise travel precautions for the country.

American Airlines AAL Delta Air Lines DAL andon Monday each extended change fee waivers through the end of February. Earlier, they had issued waivers through the end of January.

That means people scheduled to fly before then on either airline to Beijing or Shanghai — the two cities that each company serves in mainland China — can change to a different flight without paying a fee to do so.

United Airlines UAL also extended waivers for change fees on flights to Beijing, Shanghai or Chengdu through the end of February. Last week, it offered waivers through February 7.

United is also offering refunds to passengers traveling to Wuhan if they bought their ticket by January 21 and are expected to travel there from now until March 29.

Read More