Spokane, Washington is identified by which airport code?

Spokane, Washington is represented by the airport code GEG, which stands for Spokane International Airport. This airport serves as a significant hub for both domestic and international flights, and its three-letter code is utilized for ticketing, flight plans, and identification of the airport within the aviation industry.

To understand the context of the other options: IAH is the code for George Bush Intercontinental Airport in Houston, Texas; BNA stands for Nashville International Airport in Nashville, Tennessee; and DTW is the code for Detroit Metropolitan Wayne County Airport in Michigan. Each of these codes corresponds to different locations, which highlights why GEG is the correct identification for Spokane's airport.