In the 1953 case Delta Air Lines, Inc. v. Summerfield, Postmaster General et al., the U.S. Supreme Court ruled in favor of Delta Air Lines against Arthur E. Summerfield, who was serving as the United States Postmaster General at that time. The dispute arose when Delta was denied airmail contracts by the Post Office Department due to its refusal to comply with certain regulations set forth by them regarding flight schedules and routes for carrying mail which were deemed unreasonable and discriminatory by Delta Airlines. The court held that while Congress had given broad powers to regulate airmail services to the Post Office Department, it did not have authority over aspects such as scheduling or routing of commercial airlines' flights since these are primarily business decisions made based on economic considerations rather than postal needs alone.

In the dissenting opinion for Delta Air Lines, Inc. v. Summerfield, Postmaster General et al., Justice Jackson disagreed with the majority's ruling that allowed airlines to carry mail without a certificate of public convenience and necessity from the Civil Aeronautics Board (CAB). He argued that this decision undermined Congress' intent when it established CAB as an independent regulatory agency responsible for overseeing air transportation in America. According to him, allowing airlines to bypass CAB certification would create a loophole where they could operate passenger services under the guise of carrying mail. This would lead to unregulated competition and potentially compromise safety standards set by CAB. Furthermore, he believed that such practice was unfair towards other carriers who had gone through rigorous scrutiny before obtaining their certificates from CAB.