Invest1 publisher3 min readPublished
United's Kirby keeps pressing a merger case that would concentrate 40% of US domestic capacity
Scott Kirby approached American and, reportedly, Delta this year, and the arithmetic of what a combination would hold is now on the record even though no seller has agreed to sell anything.
The Investor · Invest desk
What happened
- United CEO Scott Kirby approached American Airlines earlier this year about a possible merger, and reportedly approached Delta Air Lines as well, according to Semafor.
- By one calculation cited by Semafor, a combined United-American would account for 40% of US domestic flying capacity, and many analysts predicted regulators would never clear it.
- Kirby says his push on consolidation remains hypothetical without a willing merger partner, while still arguing that United should be allowed to get much larger.
- He also ruled himself out of a rumored consolation-prize bid for JetBlue, saying integrating a small airline is about as hard as integrating a big one.
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Why it matters
- decision Kirby has taken the mid-size acquisition off United's own list, so the fallback that a blocked large deal usually produces is not one this management team says it will make.
- constraint With no seller, the New York to Miami hole and the weak Middle East and Asia service have to be closed with United's own capital and slots, and the interview describes no plan for doing that.
- contradiction A CEO's certainty that the deal helps customers and the target's description of it as anti-consumer sit on the record with nothing filed, so anyone pricing regulatory risk here is choosing between two assertions.
- precedent A sitting CEO making the 40% case out loud sets the terms of the next US airline antitrust argument before any transaction exists to review.
Semafor puts a combined United-American at 40% of US domestic flying capacity, by one calculation [4]. Take that at face value and 40 of every 100 units of domestic capacity would sit inside a single airline, leaving 60 for everybody else, Delta included [15]. The figure covers the pair. Split evenly it is 20 apiece, and neither carrier's own share appears in the source [16].
There is no counterparty. Kirby told Semafor that "my push on consolidation" remains "hypothetical" without a willing merger partner [5], and an option nobody will sell into has no expected value to compute. So the useful sentences in the interview are the ones about what United will not buy.
On the rumored bid for JetBlue, which he is not pursuing [8], Kirby said: "It's really just as hard to integrate a small airline as it is a big airline. So if you're going to go through that brain damage, my first choice is do something big" [7]. Read as capital allocation, that says integration cost barely scales with the size of the target, so a smaller target buys less network for roughly the same disruption.
What is left is organic. Kirby names gaps he says would be hard to fill without a deal, New York to Miami, plus service to the Middle East and Asia that lags the best local flag carriers [9]. He says he is not asking for the state subsidies some of those rivals get, but wants "the scale to compete" with them [10]. "I'd like to create an airline that all US citizens are proud of, and think of as a flag carrier," he said [11]. The spending he actually describes is product: Starlink in place of the "crappy" in-flight WiFi, and AI in how the airline tells customers about delays [12].
Two claims about the same transaction are now on the record. Kirby says he is 100% certain a United-American merger would be good for customers [6]. American, which rejected the overture publicly, dismissed the combination as "negative for competition and for consumers" [3]. Semafor reports that many analysts predicted regulators would never clear such a deal [2], and nothing has been filed anywhere a regulator would have to rule.
My read is that the JetBlue refusal tells an owner of United more than the approach to American does. It removes the fallback a thwarted acquirer is usually assumed to take, and it came unprompted from the executive who would have to sign it. The counter-thesis is respectable. A sitting CEO arguing the 40% case in public is laying groundwork for a review he expects to fight later, and a target's public rejection is an opening position. Kirby's own framing of long odds is "The biggest mistake that most people make in their career is never making a big mistake because they never take a chance" [17]. The read breaks if American's board engages at some price, or if United bids for JetBlue after this.
Six years of Kirby have strengthened United's reputation and profitability, with the stock out of the industry's pandemic hole [13]. On the deal itself there are no terms and no timetable, and Delta's answer is not characterized at all; Semafor says only that United reportedly approached it [1].
What to watch
- Whether Delta ever confirms or denies the approach that Semafor describes only as reported.
- Whether United turns the 40% argument into an actual filing, or leaves it as an interview position.
- Whether a JetBlue bid resurfaces from United after Kirby dismissed the idea.