It's about 20-25 miles or 15/20 minutes; technically, though, the distance is zero. An arm of the city of Fort Worth stretches east (between Hurst-Euless and Arlington) all the way to the southern...
No they are two separate cities, but they are close enough the people often mention both in the same breath, i.e. "I flew into Dallas/Fort Worth airport". In this case the major airport the serves...