Major U.S. airlines such as Delta, American, United, and Alaska Airlines use SkyWest Airlines as a regional carrier. Terminal E, an American Airlines hub at Dallas/Fort Worth International Airport (DFW), is where SkyWest mainly conducts business. Â SkyWest Airlines DFW Terminal plays a crucial role at DFW by offering flights to smaller airports around the United States and beyond, as well as crucial regional connections, particularly for travelers on American Airlines.