How a United–American Merger Could Reshape Airport Operations and Passenger Experience

A proposed merger between United Airlines and American Airlines would immediately reshape the competitive landscape among U.S. carriers. For airport leaders, the more immediate impact would show up inside the terminal, where airline operations, infrastructure and passenger experience come together.

Much of the early attention around a deal of this size will focus on network reach and regulatory hurdles. For airports, the practical questions are different. How space is used. How passengers move. How consistent the experience feels from curb to gate.

Integration Will Be Operational Before It Is Visible

At a surface level, integration would likely start with visible updates such as signage, lounges and branding. Those changes are noticeable, but they are not what defines how an airport functions day to day.

“The early phases of integration will almost certainly be visible in the least interesting places, logos quietly replaced, lounges renamed, signage rationalized,” said Dylan Stuart, senior partner at Lippincott. “All perfectly sensible, and largely irrelevant to how the place actually works.”

The more significant challenge is how each airline operates inside the terminal. United and American have developed different approaches to boarding, queue management and handling disruptions. Those differences shape how passengers move through the airport and how they interpret the experience.

“These are not cosmetic differences,” Stuart said. “They are the operating system of the brand.”

Operational disruption is expected in any merger of this scale, especially around scheduling, staffing and systems integration. The passenger experience risk is less obvious but just as important.

Airlines condition passengers over time. Travelers learn how to move through a space, where to stand and what to expect at each step. A merger interrupts that familiarity.

“The passenger arrives with one mental model and encounters another,” Stuart said. “That moment of mismatch is where irritation begins.”

For airports, maintaining clarity becomes critical. Wayfinding, communication and passenger flow need to stay consistent even as airline processes evolve. Without that consistency, the terminal can quickly feel disjointed during the transition period.

Standardization Will Create Both Opportunity and Risk

A combined carrier would likely push for greater standardization across its network. In many cases, that could improve the experience by reducing variability between hubs and creating more predictable passenger journeys.

A more consistent approach to boarding, wayfinding and service delivery could reduce confusion and improve throughput, particularly in large hub environments where complexity is already high.

But there is a tradeoff.

“Standardization has a habit of overreaching,” Stuart said. “It begins as a solution to confusion and ends with a removal of personality.”

Airports are not interchangeable environments, and neither are airline hubs. Each location operates with its own rhythm, passenger mix and operational constraints. Over-standardizing the experience risks flattening those differences and creating environments that feel generic rather than functional.

For airport leaders, the challenge is deciding what should be consistent and what should remain local. Elements that reduce stress and uncertainty, such as wayfinding clarity and boarding processes, are strong candidates for standardization. Elements that define the character and flow of a specific airport should be preserved.

Getting that balance wrong can create friction for passengers or limit an airport’s ability to operate effectively within its own constraints.

Airports Will Need to Define Their Role as Airlines Scale Up

A merger between two of the largest U.S. carriers would also reflect a broader shift in how airlines think about scale. The focus is no longer just on expanding network reach. It is increasingly about controlling the passenger journey as a cohesive system.

“It is no longer about network reach. It’s about control of the journey as a branded system,” Stuart said.

That approach could extend airline influence deeper into the terminal, from curbside to gate. For airports, the risk is becoming a collection of airline-driven environments instead of a cohesive system that they control.

To counter that, airports need to establish their own operational clarity.

“The task is to establish the airport’s own clarity at scale, a consistent framework for movement, service and communication that remains legible regardless of airline configuration,” Stuart said.

A merger of this scale also introduces long-term uncertainty into airport planning. Gate allocations, passenger flows and tenant relationships can shift quickly during integration. Waiting for clarity before making decisions is not a realistic option.

“The instinct to wait for clarity before committing capital produces tidy plans for a world that has already moved on,” Stuart said.

Instead, airports should focus on flexibility. That includes modular spaces, reconfigurable checkpoints and operational models that can adapt to different airline strategies without forcing passengers to relearn the environment.

Whether or not a United–American merger ultimately happens, the scenario highlights a broader reality for airport leaders. Consolidation changes how airports operate, not just who they serve.

Airports that maintain control over the passenger experience through clear design, consistent communication and flexible infrastructure will be better positioned to manage that change. Those that do not risk reacting to airline decisions instead of shaping the environment themselves.