United Airlines officially announced on Monday that it is abandoning its merger plan with American Airlines. This decision comes after American Airlines explicitly rejected the proposal to initiate negotiations, effectively ending what could have been the largest consolidation in the U.S. airline industry in over a decade.

The CEO of United Airlines revealed in a statement that he had presented the idea of a merger with American Airlines to the Trump administration earlier this year and had hoped to pitch the concept to American Airlines' management. He argued that merging the two largest U.S. carriers would help create a truly globally competitive airline, generate more jobs, and support the U.S. economy.

However, American Airlines had already ruled out the possibility last week. Its CEO described the merger idea as "anti-competitive" and detrimental to consumers. United Airlines stated that, given American Airlines' clear public rejection of the merger, the plan had to be abandoned.

The merger proposal faced significant opposition from the outset. Earlier this month, U.S. President Donald Trump publicly expressed his disapproval of the plan. Industry analysts widely raised concerns that a merger between the two giants would further intensify monopolistic trends in the U.S. aviation market. The U.S. Secretary of Transportation also emphasized that United Airlines would need to thoroughly demonstrate how such a merger would deliver tangible benefits to consumers if it wished to proceed.

Currently, the U.S. airline industry remains dominated by four major carriers: United Airlines, American Airlines, Delta Air Lines, and Southwest Airlines. The collapse of merger talks between United and American means the industry's competitive landscape is likely to remain unchanged in the near term.