When y'all say 'Dallas' you must be referring to Dallas-Love Field, (aka DAL/KDAL), home of SOUTHWEST AIRLINES!
Believe that you really are referring to DFW International (aka DFW/KDFW), home of 'aa'!
By the way (K)DFW stands for Dallas/Fort Worth (don't forget Fort Worth, the REAL CITY!)!
thetexpat