United CEO Pitches Blockbuster Merger

Kirby argued that a merged carrier would be better equipped to compete against foreign airlines that currently dominate international routes.

However, the proposal has immediately drawn fire from consumer advocates and labor unions who warn of higher fares and reduced competition.

Regulators are expected to subject any such deal to extraordinary antitrust scrutiny.

Shares of both airlines climbed following the reports as investors weighed the potential for a massive industry shake-up.