Where is John Glenn Columbus International Airport located?

John Glenn Columbus International Airport is located in Columbus, Ohio. This airport serves as a major hub for domestic flights and accommodates various airlines, providing essential connections for travelers in and out of the state capital. The choice of Columbus as the answer reflects the airport's naming significance, honoring astronaut John Glenn, who was the first American to orbit the Earth and a prominent figure from Ohio.

The other locations mentioned do not correspond to the airport in question. Canton is a city in Ohio but does not host this particular airport; Hartford is the capital of Connecticut and has its own airport, but it is not related to John Glenn. Norfolk, located in Virginia, also has its airport, but again, it is not associated with John Glenn Columbus International Airport. Thus, recognizing Columbus, Ohio, as the correct location aligns directly with the knowledge and context surrounding John Glenn and the airport's identity.