Delta Air Lines Inc. is preparing to leave the main trade group for U.S. airlines next year after staking out policies at odds with the rest of the industry.

The move is effective April 26, Washington-based Airlines for America said Tuesday in a statement. Delta’s differences with the group include the need to modernize U.S. air-traffic control, the group said.

“As an association we work collaboratively in the best interests of our members and the customers and communities they serve, and are most effective advocating for the traveling and shipping public when we speak with a unified industry voice,” A4A President and Chief Executive Officer Nicholas Calio said.

A telephone message left for comment with Atlanta-based Delta wasn’t immediately returned.

–With assistance from Mary Schlangenstein in Dallas.

This article was written by Edward Dufner from Bloomberg and was legally licensed through the NewsCred publisher network.

Photo Credit: A Delta plane on the tarmac. m01229 / Flickr