In August 1928 a property in
Vandalia, Ohio was called the "Dayton Airport". On December 17, 1936, the airport opened as the "Dayton Municipal Airport" with three concrete runways and connecting taxiways. In 1952 the city named the airport "
James M. Cox-Dayton Municipal Airport" in honor of the former
Governor of Ohio and
Democratic candidate for President of the United States. A groundbreaking ceremony was held in 1959 for a new $5.5 million terminal designed by Yount, Sullivan and Lecklider, completed in 1961. The airport's name became "James M. Cox Dayton International Airport" in 1975. The April 1957 OAG shows 73-weekday departures: 56 TWA, 13 American, and 4 Lake Central. TWA had two nonstops to New York but no other nonstops reached beyond Chicago-Detroit-Cleveland-Pittsburgh-Cincinnati. The first jets were TWA Convair 880s from Chicago in January 1961. The airport was a hub for
Piedmont Airlines from July 1, 1982, until its merger with
US Airways, which continued the Dayton hub for a year or two. In March 1988 Piedmont had nonstops from Dayton to 27 airports, California to Boston to Florida, plus eight more on its prop affiliate. USAir and successor US Airways kept Dayton as a focus-city. The airport was a hub for
Emery Worldwide, a freight carrier. In 1981
Emery Worldwide completed an air freight hub
sortation facility next to Runway 6L–24R. Emery added to the facility until the early 1990s, making it one of the world's largest airfreight facilities at the time. A $50 million renovation of the airport's terminal building, designed by Levin Porter Associates, was completed in 1989. A new two-lane access road was built. In June 2006, UPS ceased operations at the Menlo cargo facility, consolidating its cargo operation and sorting facility to its Louisville hub, and reducing cargo tonnage through the Dayton airport by 97% from its 2005 peak On May 1, 2011
Air Canada Express ended flights to
Toronto Pearson, the airport's only international destination, when the airline consolidated its service at
Cincinnati/Northern Kentucky International Airport. Dayton now has no scheduled international flights. On August 12, 2012
Southwest Airlines began serving Dayton with flights to
Denver International Airport. This was expected to increase passenger traffic by at least 15 percent. In 2013 Concourse D, built in 1978 and used by
Piedmont Airlines and US Airways for their mini-hub operation until its closure in 1991, was demolished. In 2015 Southwest Airlines announced a reduction in flights from Dayton: nonstop flights to Baltimore, Denver, Orlando, and Tampa all ended April 11, 2016. This left one nonstop destination from Dayton via Southwest. Passenger traffic is down nearly 9% since 2014, along with aircraft departures down 8%. Fares from Dayton have continued to rise while neighboring airports are lowering fares with new low-cost carriers.
Cincinnati/Northern Kentucky International Airport has drastically reduced fares since 2014 while also experiencing over 10% growth in passengers. On November 19, 2015, Dayton officials announced that
Allegiant Air would add service in April twice a week to Orlando and Tampa.
Allegiant Air would become the only low-cost fare carrier at the airport and would fill the gap left by
Southwest Airlines reduction in flights to Florida. On January 4, 2017, Southwest announced that it would end its flights to Chicago Midway and move services to Cincinnati/Northern Kentucky International Airport, adding eight daily flights to and from Chicago Midway and Baltimore–Washington International Airport. Southwest's last day in Dayton was June 3, 2017. In January 2025,
PSA Airlines announced that it plans to move its corporate headquarters to
Charlotte, North Carolina from Dayton by January 2026; most daily departures are from, and almost all training is in Charlotte. The new headquarters is to have 400 employees; all 350 Dayton headquarters staff have until the end of April 2025 to accept an invitation to move there. The airline will maintain a maintenance hangar and flight crew location in Dayton, with a total of 550 employees. On February 3, 2025,
Air Wisconsin, which at the time was operating regional jet services for
American Airlines, released a statement that due to a shift in business operations, more than 200 employees would be laid off at the airport by the end of March or middle of April; 185 unionized employees would be temporarily laid off, while 20 management and salaried workers would be permanently laid off. American Airlines stated that the jet service provided by Air Wisconsin would be shifted to other regional carriers. Today the airport covers , and has of runway. ==Construction projects==