Cincinnati ( ) is a city in and the county seat of Hamilton County, Ohio, United States. It is the third-largest city in Ohio and the 65th-largest city in the United States. It had a population of 296,945 at the 2010 census. According to the census, the population of the metropolitan area was 2,214,954 – the 28th-largest Metropolitan Statistical Area (MSA) in the United States and the largest centered in Ohio. Settled in 1788, the city is located on the north side of the confluence of the Licking with the Ohio River. The latter forms the border between the states of Ohio and Kentucky.

Cincinnati/Northern Kentucky International Airport , is a public international airport located in Hebron, Kentucky, United States, and serves the Greater Cincinnati metropolitan area. Despite being located in Boone County, the airport operations are governed by the neighboring Kenton County Airport Board. The airport's code, CVG, comes from the nearest major city at the time of its opening, Covington, Kentucky, as the airport was built to replace the former Cincinnati Municipal Lunken Airport, so there were limited airport codes to be used. Cincinnati/Northern Kentucky International Airport covers an area of . It is the only airport in Kentucky, Ohio and Indiana with nonstop service to Europe. International destinations include Cancún, Freeport, Montego Bay, Paris, Punta Cana, and Toronto. The airport is the busiest in Kentucky, along with the second busiest serving an Ohio metropolitan area. The airport is the 8th largest hub for Delta Air Lines along with Skywest Airlines and GoJet Airlines operating under Delta Connection. Also, the headquarters and main maintenance base for Delta Private Jets is located at the airport. The airport is the largest base for Allegiant Air that is not a vacation destination, hub for Cincinnati-based Ultimate Air Shuttle, largest market for Vacation Express, and the 8th largest market for Frontier Airlines. In addition, CVG is also one of three large global hubs for DHL Aviation and DHL Express, ranking 6th in North America and 34th in the world for total cargo operations, while also being the fastest growing cargo airport in North America. The airport is headquarters and hub for Southern Air, which operates flights around the world for DHL Aviation. In total, the airport offers non-stop passenger service to 53 destinations with 160 peak daily departures.