United Airlines Introduces Digital Tool to Help Navigate CDC Requirements January 26, 2021 United Airlines' Travel-Ready Center digital tool will make it easier for its guests to comply with COVID-19 testing rules. Photo: United Airlines. United Airlines introduced on Monday its “Travel-Ready Center” digital tool, aimed at making it easier for customers to navigate travel restrictions, just as the CDC testing requirement for international travel goes into effect. Through the app- and web-based platform, customers can review COVID-19 entry requirements, find local testing options, and upload any required testing and vaccination records for domestic and international travel, all in one place. Customers who upload test results can be also be cleared for check-in and receive their boarding pass before getting to the airport.