Speculation that two of America’s largest carriers might combine to form the world’s largest airline has been raised.

The conjecture arose after United CEO Scott Kirby privately floated the idea to U.S. officials, including President Donald Trump, framing a potential merger as a way to strengthen American competitiveness on the global stage.

However, in a statement American Airlines said it is “not engaged with or interested in any discussions regarding a merger with United Airlines,” emphasising that such a deal would harm competition and ultimately hurt consumers.

“Our focus will remain on executing on our strategic objectives and positioning American to win for the long term,” the statement continued.

The airline argued that combining two of the nation’s largest carriers would reduce choice, raise fares and contradict antitrust principles the company believes the current administration supports.

Reports indicate that Mr Kirby first pitched the merger idea to President Trump in February, suggesting that a larger, combined airline could better compete with major international carriers, particularly in markets where U.S. airlines struggle to match the reach of Middle Eastern and Asian competitors.

He argued that a unified network might encourage more passengers to stay with U.S. carriers on long‑haul routes.

But American Airlines has rejected that logic, insisting that the drawbacks far outweigh any strategic benefits.

The carrier cited concerns that a merger would create an airline controlling nearly 40% of the domestic market, with overwhelming dominance in key hubs such as Chicago O’Hare – an outcome analysts warn would trigger steep regulatory resistance.

Past antitrust actions, including the Justice Department’s successful challenge of the JetBlue–Spirit merger, suggest that regulators would scrutinise any such deal intensely.

A merger of this scale would be unprecedented in the U.S. aviation sector and would almost certainly prompt a lengthy federal review.

Analysts warn that reduced competition could lead to higher fares and fewer route options, particularly in overlapping markets.