American Airlines (NASDAQ:AAL) and Dallas-Fort Worth International Airport on Thursday unveiled revised plans for Terminal F, finalizing a $4 billion expansion project. The two said in a statement that the plan will increase the number of gates at the new terminal to 31,

DFW International Airport could soon be the largest airline hub in the world. The airport made that announcement on Thursday after American Airlines agreed to invest $4 billion to double the capacity of Terminal F.

DFW Airport's sixth terminal will be almost double its originally planned size and will have only American Airlines flights, the airport announced Thursday. Why it matters: The airport, almost midway between Dallas and Fort Worth,