Delta, the only major airline to block middle seats on all flights, is continuing the policy through April. Bill Lentsch, chief customer experience officer, said the move is in response to customer demand. He said the carrier would continue to reassess seat blocking in relation to case transmission and vaccination rates, while bringing back products and services in ways that instill trust and the health and safety of everyone on board. In addition to the seat-blocking commitment, Delta is taking other steps to reassure passengers as they return to travel, including making it easier to understand testing requirements and how to get testing prior to travel with an at-home test or at a nearby location; creating an interactive travel map to help customers understand the restrictions at Delta destinations; building a digital concierge to manage booking, test scheduling and automatic document verification on the Fly Delta app; deploying a team of “clean ambassadors” to ensure a safe and sanitized experience at more than 55 airports; and expanding rapid testing centers at hub airports.