Yet Miller has taken a more nonchalant perspective on the matter.
"The issue with the Paulding airport is not a major issue with what we're doing," Miller said. "And I know Delta has taken some different approaches and Mayor Reed has been out there ... The mayor is the one that makes the decision on those things and he's the one that makes the decision going forward."
Reed's administration has taken a stronger leadership role in Hartsfield-Jackson than his predecessor, having more direct involvement in decisions about the airport's future such as concessions contracts and environmental programs.
The administration played a crucial role in the airport's massive round of concessions contracting, for example. Those contracts led to months of legal challenges last year.
Miller took a lower-profile approach to the job than his predecessor, DeCosta. DeCosta engaged in tough lease negotiations that put him at odds with Delta, the airport's largest tenant, and ended up leaving the airport after Reed took office.
The next airport manager will likely take on the task of another round of lease negotiations with Delta.
Robert Highsmith, a Holland & Knight attorney who has represented the airport, praised Miller's work overseeing the completion of the international terminal. Highsmith is also Reed's personal attorney.
The contract calls for DeCosta to get a base salary of $255,000 a year with a 4 percent annual increase through June 30, 2010.
Manager, Atlanta's highest-paid employee, would get a raise and a city car
A longtime manager at Atlanta's city-owned airport said he was fired last week for speaking out about corruption.
It is the second year in a row Hartsfield-Jackson has been dubbed the world's busiest airport in both number of passengers and number of flights.