Cost, Maintenance, For most people a clocks going down the concourse would be redundant. Every Arrival/Departure Board has it, Most of the Gates have Digital TV/Gate Information Boards now, They have clocks on them. Most passengers have a Cell Phone with a clock on it also.

The common belief that there are "no clocks" in airports is largely a myth, as 2026 airports are actually filled with timekeeping devices on every FIDS (Flight Information Display System) screen, gate monitor, and computer terminal. However, you will rarely see large, traditional "analog wall clocks" in the main terminal concourses for two strategic reasons. First, airports use networked digital time; a single manual clock that is even one minute slow could cause hundreds of passengers to miss flights and blame the airport. Second, psychologists suggest a "timeless" environment encourages "Terminal Dwell Time," where relaxed passengers spend more time—and money—in duty-free shops and restaurants without the anxiety of watching a ticking clock. By keeping the time on your phone or on the digital boards, airports ensure that the only "time" you focus on is your specific boarding window, reducing general terminal chaos and maximizing the commercial productivity of the airport space.