Which city is represented by the city code DFW?

The city code DFW stands for Dallas/Fort Worth, Texas, which is a primary airport code representing the Dallas/Fort Worth International Airport (DFW). This airport serves as a major hub for domestic and international flights and is located between the cities of Dallas and Fort Worth.

In the context of airport codes, each one is typically made up of three letters, often derived from the name of the city or the airport itself. DFW efficiently combines both city names, reinforcing its identity as a key transportation center for the region. Moreover, the airport is well-known in the airline industry for its size and the volume of air traffic it handles, further solidifying its association with the city code DFW.

The other city codes provided do not match DFW. Each represents different locations: Denver International Airport (DEN), Detroit Metropolitan Wayne County Airport (DTW), and Des Moines International Airport (DSM). Thus, the unique association of DFW specifically with Dallas/Fort Worth makes it the correct answer.