Southwest Airline Detroit

Detroit Metropolitan Wayne County Airport, usually called Detroit Metro Airport, Metro Airport, or just DTW, is a major international airport in the United States covering 4,850 acres in Romulus, Michigan. It is the primary international airport serving Detroit and is Michigan's busiest airport

DTT is for all airports in the Detroit metro area. DTW is for Metropolitan Wayne County airport specifically. Please note that the only commercial airport in the Detroit Metro area that produces any results on the search engines is DTW.