All seven passenger airlines that are members of the trade group Airlines for America (A4A) have now pledged to implement a voluntary contact tracing program for international travel.
Alaska, American, JetBlue, Southwest and Hawaiian have joined Delta and United, which began contact tracing in December.
The seven carriers have agreed to ask customers for contact information -- including an email address, phone numbers and the address where they will be once they reach their destination -- that will be shared with the CDC.
"We are hopeful that this measure, coupled with existing testing requirements for passengers flying to the U.S., will lead policymakers to lift travel restrictions so that international travel can resume and the social and economic benefits of that travel can be realized," A4A CEO Nick Calio said.