Delta also waives change fees for March:

"We realize customers have questions about the ongoing COVID-19 or coronavirus outbreak and the possibility of further government travel restrictions. In response, Delta will waive change fees for all flights booked between March 1-31 to any international destination the airline serves.

This travel waiver allows customers to make a one-time change to their itinerary without incurring a fee. The waiver applies to all travel outside the U.S. as well as Puerto Rico and the U.S. Virgin Islands. See more details on delta.com."

"Affected Customers: All international tickets (not including travel within the U.S. 50) issued between March 1, 2020 - March 31, 2020

• Impacted Travel Date(s): March 1, 2020 - February 25, 2021
• Ticket Must Be Issued On/Before: February 28, 2021
• Rebooked Travel Must Begin No Later Than: February 28, 2021"