Airlines plan to resume flights to Puerto Rico as early as Friday after Hurricane Maria left the island territory without power.
American Airlines says it plans to send its first plane to San Juan from Miami Friday morning. Spokesman Ross Feinstein says passengers will include federal airport screeners to help run security checkpoints at Luis Munoz Marin International Airport.
Delta Air Lines expects to resume flights from Atlanta and New York to San Juan on Saturday.
A spokesman for United says the airline is still assessing the situation but won't operate flights there on Friday.
A spokesman for Frontier says the airline plans to fly in relief supplies and take passengers out to Orlando, Florida, as soon as the San Juan airport opens.
Flights to the Dominican Republic resumed Thursday.