Airport terminals have always evolved in response to new aircraft and changing airline market conditions. The way terminals are built and how people move through them depends on the types of aircraft at the gates and the number of passengers arriving and departing. For many years, both aircraft types and passenger growth remained relatively stable.
For example, the Boeing 737 has been one of the most common commercial aircraft and has been widely used as a baseline for sizing airport terminals across the country. While the 737 has undergone successive upgrades since its first flight in 1967, its underlying airframe has remained largely unchanged. As a result, these upgrades have had only minor impacts on the terminals that serve them.
Because of this stability, airports have primarily focused on accommodating growth, expanding to serve increasing numbers of passengers as the main driver of terminal improvement.
From Incremental Gains to Structural Change
Now, things are changing. Both aircraft design and the airline market are shifting simultaneously. This means airport leaders must do more than respond to a single point of change; they must rethink how they plan, design and invest in terminals.
Aircraft like the 737 are reaching the limits of their upgrade potential. At the same time, new types of aircraft are
being developed. These aircraft are not simply more efficient versions of legacy designs; they differ in shape, size and cabin configuration. They are being introduced to meet the needs of a changing airline industry that demands more fuel-efficient aircraft tailored to specific passenger segments.
A Mature Market
The North American airline industry is no longer defined by rapid passenger growth. If airlines are still expecting huge growth in traffic volume, they probably will be disappointed. The market already has reached a relatively high level, especially after the post-pandemic rebound.
In a mature market, airlines now are focusing less on increasing passenger volume and more on improving
profitability, through fuel efficiency and enhanced passenger spending. They rely heavily on data to understand what specific passengers want and how much they are willing to pay.
Passengers, in turn, are more informed and selective. They choose among ticket types, loyalty programs and ancillary services. This has led to a more segmented market. Airlines now offer a range of differentiated experiences rather than a single, uniform journey. This is evident in the growing variety of lounge tiers
and service levels within airports. What was once a standardized passenger experience has become a menu of options.
The New Demand
Historically, airports responded to growth by adding more screening lanes, expanding concessions and increasing waiting areas, based on forecasts with the assumption that passenger numbers would continue to rise and aircraft design would remain relatively stable.
Those assumptions no longer hold.
In a mature air travel market with an aging population, airlines are shifting toward fuel efficiency and passenger
experience rather than steady capacity growth. Airport terminals must evolve accordingly. Simply making terminals larger will not solve these challenges. In many cases reconfiguration will be the solution, not expansion.
The Planning Challenge
Airport planning has traditionally grouped passengers into broad categories, such as domestic versus international travelers. These categories helped identify the amenities and services terminals needed to provide. However, they are no longer sufficient to support today’s data-driven airline strategies.
To keep pace, airports must understand passengers at a much more detailed level. The type of passenger an airline targets influences how they arrive at the airport, how they move through the terminal and even the type of aircraft they use.
Effective planning now requires viewing passengers as distinct “personas,” each with unique needs and expectation Terminal planning based on persona mapping will be critical, not only for aligning with airline strategies but also for supporting funding approaches that are not solely based on capacity. It will also guide designers in creating terminals thserve a diverse range of users.
A Plan for Airport Leaders
To adapt to these changes, airport leaders should focus on three priorities:
1. KNOW YOUR PASSENGER
Do not rely solely on total passenger counts. Understand different passenger types, how they travel, what they value and how airlines target them. Detailed passenger data is now one of the most important tools for terminal planning.
2. KNOW THEIR JOURNEY
future terminals must support the full passenger journey. This includes evolving modes of access, varied check-in and security processes and differentiated service levels. This journey should be analyzed using universal design principles to ensure accessibility and usability for all passengers, while delivering tailored experiences for different personas.
3. LET THE PASSENGER JOURNEY DRIVE FRASTRUCTURE
Passenger segmentation and airline strategies should inform only what amenities are provided, but also where they are located. Infrastructure will be driven by knowing at what point in the passenger journey specific amenities are expected or required. These placement decisions influence the design of the entire terminal, not just circulation.
Addressing these needs may require significant investment, as simple expansions or retrofit solutions may not be sufficient. Larger terminals do not necessarily deliver better or more flexible passenger experiences, nor do they inherently support the demands of next-generation aircraft.
A Call to Action
Terminals built or renovated today will serve airports for 40 to 60 years. Over that time, aircraft, airlines and passenger expectations will continue to evolve.
The message for airport leaders is clear: The traditional approach, planning terminals based solely on increasing passenger volumes, is no longer sufficient.
Airports that focus only on expansion risk falling short of airline and passenger needs.
The airports that succeed in the future will:
Understand their markets in detail
Plan for reconfiguration based on that understanding
Invest in flexible solutions that deliver tailored passenger experiences
Airports have always been shaped by passenger and aircraft counts. As aviation continues to evolve, the most successful terminals will be those designed not just for more passengers or more aircraft, but for the specific passengers and communities they serve.