Scott Kirby’s approach to Ed Bastian did not advance beyond early talks, but the episode shows how America’s biggest carriers are still testing the limits of consolidation.
United Airlines explored a potential merger with Delta Air Lines last year, a bold approach that would have combined two of the most profitable and valuable carriers in the United States but almost certainly faced intense regulatory scrutiny.
United Chief Executive Scott Kirby initiated the outreach with a call to Delta CEO Ed Bastian, according to reporting by The Wall Street Journal. Delta examined the idea during preliminary due diligence, but the discussions did not move forward and both sides ultimately dropped the possibility.
The proposal was striking not only because of its scale, but because of the companies involved. Delta and United are widely viewed as the strongest performers among the major U.S. airlines, with premium-focused strategies, large international networks and powerful loyalty programs. Together, the two carriers accounted for more than 90 percent of industry profits in 2025, according to the report.
For Kirby, the approach reflected a broader strategic ambition: building a larger global airline at a time when the industry’s biggest players are competing for high-value corporate travelers, premium customers and long-haul international traffic. United has spent recent years trying to narrow Delta’s advantage in customer perception and premium service, while also expanding its global route map.
But a United-Delta merger would have been one of the most difficult airline deals ever attempted. The two carriers are not struggling operators seeking rescue; they are dominant rivals with major hubs, overlapping corporate markets and extensive international alliances. Any formal transaction would likely have drawn aggressive examination from antitrust regulators, lawmakers, consumer groups and rival airlines.
The failed Delta approach also fits a wider pattern. Kirby later explored a possible merger with American Airlines, but American rejected the idea, saying it had no interest in talks and warning of likely competition concerns. United eventually said those discussions had ended.
The renewed interest in consolidation comes after years in which U.S. airlines were reshaped by major mergers, including Delta’s combination with Northwest, United’s merger with Continental and American’s merger with US Airways. Those deals created today’s dominant network carriers, leaving fewer obvious targets and making any further merger far more politically sensitive.
For consumers, the question would be whether a larger airline could offer broader networks and better service, or whether consolidation would reduce competition and push fares higher. Critics of major airline mergers have long warned that fewer carriers can mean less choice, reduced service on some routes and weaker pressure to improve prices. Supporters argue that scale can help airlines invest in better aircraft, technology, loyalty programs and international connectivity.
The United-Delta talks never reached that stage. There was no announced deal, no regulatory filing and no public campaign. Yet the episode is significant because it shows that even the strongest U.S. airlines are still considering combinations once thought nearly impossible.
For now, Delta remains independent, United remains focused on its own growth strategy and the U.S. airline industry remains defined by four major carriers. But Kirby’s outreach to Bastian suggests that consolidation ambitions have not disappeared. They have simply moved into a more cautious phase, where even preliminary conversations can reveal how far airline executives are willing to imagine reshaping the market.
