Delta Air Lines is rejoining the airline industry lobbying group Airlines for America after a four-year hiatus. The powerful trade group represents almost every U.S.-based airline.

“Delta and our employees look forward to rejoining A4A and working jointly with other airline members to address issues that impact our people, our customers and the communities we serve,” said Ed Bastian, CEO, Delta Air Lines. “We are committed to the future of commercial aviation, and will work together with A4A to support priorities like promoting sustainability initiatives, fighting unnecessary passenger taxes and advocating for policies that enhance the travel experience.”

Nicholas E. Calio, President and CEO, A4A said he was glad to have Delta back in the fold, joining Alaska Airlines, American Airlines, Atlas Air Worldwide, FedEx Express, Hawaiian Airlines, JetBlue, Southwest, United, UPS and Air Canada.

“We are a stronger association with Delta as a member,” Calio said. “As an industry organization, we work collaboratively in the best interests of our members as well as the customers and communities they serve. We are more effective advocates for the traveling and shipping public when we speak with a unified industry voice.”

Delta withdrew from the organization in 2015 because it said its policies were not aligned with A4A policies, and membership was not worth the $5 million annual dues.