Which city is represented by the airport code DAY?

The airport code DAY corresponds to Dayton, Ohio. Each airport in the United States is assigned a unique three-letter code, known as the IATA code, which is used for ticketing, flight information, and baggage routing. The code DAY is specifically derived from the name of the city it serves, reflecting a common practice in airport naming where the code is related to the city's name.

In this case, Dayton is a significant city in Ohio, and its local airport is officially designated as Dayton International Airport, which aligns with the IATA code DAY. This coding system helps travelers quickly identify their departure and arrival airports.

The other cities listed have different codes: Columbus, Ohio is represented by the code CMH (John Glenn Columbus International Airport), Colorado Springs is represented by COS (Colorado Springs Airport), and Cincinnati, Ohio by CVG (Cincinnati/NKY International Airport). This distinction further emphasizes why DAY is specifically linked to Dayton, Ohio.